Thanks for pointing this out. XP+FF is indeed important, it is about 4% of our traffic. The CSS fallback is being fixed.
The font looks same on 7 & XP both: http://www.browserstack.com/screenshots/21265f29764195b7a298... http://www.browserstack.com/screenshots/a81e07f3288687d3fc0f...
Would you be kind enough to upload a screenshot of the blurry font? :)
http://postimg.org/image/572wjz4rp/
It's similar to what browserstack shows (the wavy look of the top bar of the capital T in the headline, the "hat" on the capital O in the text), but in some ways it looks worse on my system, especially the bold face:
http://postimg.org/image/r4zddrjs5/
Note the jaggy lower part of the bold, lower case y, and how the bottom of the bold lower case e and the top of the bold lower case t are thinning out precariously..
Times, on the other hand, does not look blurry:
http://postimg.org/image/4cl9wjwql/
Maybe my eyes need recalibration, but personally I find times much easier to read, mostly due to its crispness.