try this to remove all font smoothing from windows 7
Windows Registry Editor Version 5.00
XP-style font smoothing is inferior to ClearType's subpixel anti-aliasing, particularly now that it's anti-aliasing along two axes in Windows 7 (as opposed to the single axis anti-aliasing in XP and Vista's ClearType/GDI+).
Microsoft is moving forward with Direct2D and DirectWrite, even though Direct2D is an abomination of an API, and that means ClearType-only.
ClearType's glyph rendering looks practically identical to OS X's rendering...when it works correctly.
I don't understand. You disabled ClearType, which means you disabled font anti-aliasing, which means your font rendering should be aliased. That is the result of disabling ClearType.
If you want subpixel glyph anti-aliasing, leave ClearType enabled. If you want aliasing on glyphs, disable ClearType.
GDI font smoothing was broken. It relied excessively on hinting to achieve satisfactory rendering at small font sizes. In Windows 7, you have either GDI+ or DirectWrite, the latter using bi-directional anti-aliasing so no hinting is required at small font sizes. The old font smoothing method is not in any way faithful to the original font, whereas the new ClearType method is.
I'm surprised the OP had to go to OS X to get decent text rendering, because in my opinion Windows 7 now has a very slight edge in the quality of its glyph rendering (though kerning is still fucking terrible compared to OS X).
it's a combination of no anti-glare coating, high pixel density, and high contrast. i'd probably rank it like that as well. even with a high pixel density an aggressive or even medium anti-glare coating will blur all the sharpness away. that's why apple retina displays look as sharp as they are since they use glass surface (no anti-glare), very high pixel density relative to other panels, and reasonable contrast.