well in just playing around, i find that it appears to scale accurately.
i bumped my clock up to 3.5 and got a 207%http://img337.imageshack.us/img337/8311/jaybss35pi6.th.png
the clock increase being 16% over 3.0 and gaining 15% in performance. anyone else tried this?
on another note, the new c2d's (e8400 as we saw) does appear to have some nice improvements even at the same clock speed