(top) IE9 RTM in compatibility view for all sites, sample from Google results:
^(bottom) IE8 RTM, no need for tweaks, it just works.
No CT tuning performed and everything in Windows 7 is at default settings
The first bug concerning this was posted on IE connect a year ago with no response asking for any specifics. Then this was brought up several times here and directly on relevant threads soliciting questions. Maybe they could not be answered but neither was there interest to solicit feedback on this at that time. The "transparency" could have been a honest answer of "very unlikely that we can fix this for rtm" instead of a year of no response in Connect, ie blog or here.
Eagerly awaiting all the comments boasting superiority of LCDs, which from what I hear at 1:1 scale/zoom have trouble letting their users tell apart those those two examples and how everyone who upgraded from LCD to CRT must "upgrade" back to LCD, tune their ClearType that works perfectly in all apps but IE9 and ...
(parody of certain comment in a certien blog)
FunnyKB100700 "Fuzzy text rendering in IE9":
1) Do you have x,y,z installed? If so ...
2) If you use a CRT, they may not make red+blue together look like black like some LCDs do
3) Try another brand of LCD's, your current one might be able to show you what the GPU is really pushing instead of our fake-black
4) Please let us add some more URLs into our compatibility list, Which by the way doesn't reliably work in the RTM (some sites it renders very close if not 1:1 like GDI text wise when set to be enabled for all sites)