Yes, but froyo seems to use more of the cpu capabilites.
See: nexus one compared to nexus one 2.2 for cpu score on my chart, that's such a big improvement!
I hope that froyo comes to uk handsets soon!, still counting on september for uk.
Can froyo be rooted and does the lagfix still improve things?
Also, a note to the developers of this program, I didn't enjoy having to install another market place app, just to get the advanced version, it should be on the regular market.