Intel Mac benchmarks
Someone at WWDC has run some xbench benchmarks on a devkit intel Mac. However, the results can't really say much about the actual performance of either the Mac or the version of Mac OS X, since probably even the benchmarking application runs in Rosetta emulation.
Comments of WWDC attendees however are that the machines "feel like Macs", which is much more important to us, currently. Apple will make sure that performance of the intel Macs is more than good enough when they appear on the shelves in June 2006.