MBP Retina: Poor image quality from hdmi output

I just had to return a Macbook Pro 13" because of this problem. I was using a HP 2311 HDMI monitor. At first, the screen would only show the upper half of the dock. I was on the phone with Apple Care and they suggested I use underscan. It worked, in that it corrected the screen size problem, but the image quality, especially rating to text was ridiculously poor. There was no suggestion available as to how to fix this. Yet, in display it says that the display is optimized for the HP 2011.
I must say I was really surprised about this defect. I was even more surprised that the problem has been around so long without a resolution. There is no doubt that this shakes my confidence in Apple products. Thankfully, my iPad, iPod and Apple TV have always been reliable.

I've now tested with the following cables/adapters between my rMBP -> Dell U2410:
mDP -> VGA
mDP -> DVI
mDP -> HDMI
HDMI -> HDMI
HDMI -> DP
None of them work. Some people are reporting *minor* differences when switching from HDMI to DVI, but I think that's mainly psychological persuasion. In my experience nothing helps - fonts are still blurry, bad image quality. I've taken still photos with a Cannon DSLR to compare the pixels - no difference.
Someone also reported on other threads that lowering the Dell U2410's sharpness "solves" the problem, I find this to be untrue and a "fool's solution". Fonts do look sharper, but everything else looks horrible.
My understanding is that this is related to rMBP and/or Mountain Lion external display drivers. Hopefully this can be addressed with a software update. I really hope Apple is aware of this issue (many have filed bug reports).
More "good" discussion on the matter can be found here: http://forums.macrumors.com/showthread.php?t=1390034

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Poor image quality save for web

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asv wrote:
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