How long is your shutdowntime from MBP Retina 13" ML? (and more)-Please help!

Question

Hello everyone,
I have been searching in this Support Community for a while, but I cannot really find a solution/answer to my issue(s):
Note: If you do not feel like reading my whole story, PLEASE only post your shutdown time from your MacBook Pro Retina 13", 2.5GHz, 8GB with Mountain Lion.
I have bought a new MBP Retina 13", 8GB, 128GB (basic model) at the 23rd of DEC 2012 and I have not got the chance to really use it because it keeps getting problems (trackpad was not working well, battery health never 100%, shutdown time of 23secs and more - will tell). Called Apple Care within 5 days: Told me this all is not the way it should be, advised me to go to the Apple Store to let it check (traveling time for me is about 2 hours).
Went to the Apple Store in Amsterdam (I live in the NL) with these issues (bought this MB at a reseller abroad though - cannot go back): Genius told me some hardware should be replaced because this is not a software problem (tested). I mentioned the DOA Policy, because I did not even got the chance to use my new precious rMBP and I mentioned this problem within the 14 days. He told me I could NOT get a new rMBP from them, because I did not bought it straight from Apple (Apple Store online/offline). Okay fair enough, I let it repaired: new SSD 128GB including top case, new trackpad, new battery. Found it a little bit doubtful to replace this kind of hardware from a 2-week old rMBP.. Picked it up 7 days later.
Tested it somewhere in a quiet place nearby the Apple Store. Trackpad was working as it should be, battery health was 100%, shutdown time was still 23 seconds.. Rebooted that thing, waited for 5min (staring at it) and shut it down again; 23 seconds. Started it up, opened only Safari and iPhoto, shut it down right afterwards, 23 seconds.
Went straight back to the Apple Store. Told a Genius at the Bar what was going on. He tested it, told me this is NOT normal. Took it to the technician room, they tested it for like 15min, came back with the technician man, told me that this was NOT normal, BUT they could not find what causes this and told me they have never seen/heard this issue before. Got the 'manager' to talk to me (his nametag did not tell he was the manager though) and suddenly it was a 'non-issue' and told me to go home..?!
I told him the whole story - again, mentioned that I had also shut down some MBP Retina's 8GB in different Apple Resellers and this particular Apple Store, and ALL shut down within like 3-5sec. He said I could not compare these models with my rMBP because those probably (probably) are all demo models. Okay, so what is he telling me, that I got fooled by Apple; their show models are working better than the one I bought?
Anyway, got over this, I thought if everything is working well then I just leave it this way. Then two days later the battery health drops to 98% with 2 load cycles, and System Information and Coconut Battery gave a different battery charge than the one in the right upper corner of my screen (5% higher on the screen).
Also, my storage gets fuller and fuller by the day, while my rMBP is still empty from files. The only thing I did was installing iWork '09, MS Office 2011 and Coconut Battery. And the only thing I did those days was surfing around to find answers for my issues (instead of studying). So only Safari has been used. My storage space left at this moment is 88GB from my 128GB, so what is happening? I checked a lot about this at this Community, tried a lot, nothing works.
And third, my shutdown time is still 23 seconds, while a friend of mine owns a new MacBook Air 13", 4GB SSD, Mountain Lion and his shutdown time is like 4 seconds. All my Macs with Mountain Lion shut down within like right away, 4 seconds. And they do not even have SSD and 8GB. So how can this be 'not an issue' (manager did not used the word NORMAL) with my NEW rMBP?
I am familiar with working with Apple Products since a very long time, I have been using iMacs and other MacBooks for the last 6 years and I have never (ever) had this much trouble with an Apple product. I am highly disappointed and I think I have the right for a new rMBP - since replacing 3 major hardware parts, speaking with Apple Care for 6 times and going to an Apple Store twice, within ONE MONTH is not solving all these problems. I think a MacBook worth €1800 (in the NL) should not be like this!
Thank you for reading this whole story. I thought I should tell you everything in detail so you have all the information you might need to help me out with maybe one of these problems.
I thank you very much in advance!

Answer 1

Well to update my own thread just for the people who are reading or for the people who are also searching for an answer:
I was sick of it that Apple Care told me to go to the Apple Store and Apple Store told me to call Apple Care.. So I decided to tell my story to.. Tim Cook. I know.. but I did email him, and I know.. he won't be reading those emails himself. Anyway, wasn't expecting to hear anything from Apple HQ any time soon, but it already gave me a better feeling to email this.
The very next day I got a call from the Apple Store right away: I was getting a new rMBP! And I am typing on it right now. Everything works perfectly fine and the shutdown time is sometimes 3-4 seconds and sometimes it takes a little bit longer, like about 20 seconds.
But the shutdown time wasn't the only issue that I emailed for - I know this thread was about the shutdown time so I am coming back on that.
The conclusion I can make based on my experiences with Mountain Lion on different Macs in this house (and my two Retina's I worked on) is the same as what already is mentioned before; it has to do with Mountain Lion.
BUT, in MY case and the reason why I opened this thread, it was NOT Mountain Lion. It was my rMBP for sure.