Slow Sleep after upgrading to SSD

Question

Ladies and Gentlemen,
I don't understand why but after upgrading my MBP to solid state drive 500GB the Sleep is now taking up to 30 seconds. My girlfriend has a similar MBP but with standard 750GB HD and going to Sleep only takes one or two seconds, in another words my mac is keeping the display active for up to 30 seconds every time I click on sleep buttom.
here is my config:
Model Name:          MacBook Pro
  Model Identifier:          MacBookPro9,1
  Processor Name:          Intel Core i7
  Processor Speed:          2.3 GHz
  Number of Processors:          1
  Total Number of Cores:          4
  L2 Cache (per Core):          256 KB
  L3 Cache:          6 MB
  Memory:          16 GB
  System Version:          OS X 10.8.5 (12F37)
  Kernel Version:          Darwin 12.5.0
  Boot Volume:          Macintosh HD
  Boot Mode:          Normal
Could you please share any knowledge you may have regarding this issue?
Thanks,
Gil

Answer 1

I found an article from a gentleman explaining how to turn off Safe Sleep Mode. I followed the instructions below:
Turning Off Safe Sleep
Open the Terminal (in Applications > Utilities), then type the following command:
sudo pmset -a hibernatemode 0
Press Enter. You’ll be prompted to enter your password. Do so, then press Enter again.
Next, type this command:
sudo rm /var/vm/sleepimage
Restart.
Now my MBP is going to sleep in seconds like before. I understand what it is happening, so my question now is, did it have the safe mode enabled when I had the HDD installed? Or is it trying to be smart and now that I have a SSD it decided to enable the Sleep Safe Mode thus increasing time before it sleeps because it is saving 16GB of RAM?
here is the link to the gentleman's article:
https://www.rowlandblogs.org/users/robertquiroz/weblog/be6de/
Please SSD users let me know if you had to do the same thing.
Have a great day!
Gil