Intel Macs are fast
According to unidentified developers the developer kits are screamingly fast, at least that's what they are telling Appleinsider. I don't often link to Appleinsider, but this isn't a rumor, per se, and who really likes NDA anyway?
The developers report that Rosetta (the PowerPC emulator that will be part of OS X on Intel) works seamlessly, as Apple promised. The best news is that applications running in the emulator are fairly speedy, all things considered.
I, for one, welcome our new Intel overlords.