Here is a before and after shot using Font mods. It appears that the problem is that default font is trying to pre-alias the characters thus making the fonts appear unfocused. Even with a 24" 1920 x 1200 display and a DVI interface, there is no cleaning up this problem short of overwriting the fonts with replacement fonts. There have been lots of posts in here on this problem. Hopefully the developers read these forums too.
If so many people had this issue that somebody had to come up with a mod just to fix it. Well, as the saying goes, all the people can't be wrong.
The forum software will resize these images so make sure you click on them to open them up in a new window at full res. The difference is unmistakably better with the mod install.
Before
After