It's aliased. Not clean.
I can't seem to reproduce the problem. Here's how I see it:
http://cl.ly/2fJO
That looks pretty anti-aliased to me.
Plus it's at a high contrast with the rest of the site. You can't just come in declaring swiss style when everything else is not.
I agree, but building on your previous statement it's better than nothing. There's always room for improvement :)