Hmm I thought I was using SFML2.0, but I think it's 1.6 (I'm using the SVN trunk version).
Ok. This bug has been fixed in SFML 2.
My graphics card doesn't even have a name... It is an integrated one.
Ok, so the 10 FPS might just be your computer
However, one or two other users reported bad performances on Windows 7, and I still haven't found why.