That seems excessive, perhaps just upgrade to a more progressive font-smoothing algorithm? ClearType is built for lo-res displays (it snaps pixels to a grid rather than smoothing), so as you'd expect it looks like utter crap on a nice monitor. I have heard good things about gditray:
This is probably the 4th or 5th link this week that has been barely legible (windows 7/chrome). Note to blog authors who want to use custom webfonts: If you are not testing on non-IE windows, you could be alienating a very large percentage of your potential readerbase.
Americans either write a single vertical stroke or an upward hook with a horizontal base line. Europeans (well, Germans and Hungarians to my own knowledge) write just the upward hook - to distinguish this from a 7, they cross the seven.
This font rendered fours (Chrome on Win 7) without the horizontal bar, leaving something that looked like a 1, to me.
(Designers on OS X: ClearType does not render fonts the same way.)