I think we need to look at benchmarks in a different light. There are benchmarks which measure CPU performance and those which measure I/O. I can't say which if any of these measure I/O since I haven't looked at them closely, but I keep hearing how crippling the 1MB L3 cache is.
Did anyone stop to consider that these tests may mainly measure CPU performance so comparing an 1Ghz G4 with 2MB L3 cache versus new one with 1MB L3 cache you'd expect to get the same results or close to it. And if that is the case, it tells me the 2MB L3 cache doesn't do much in terms of performance.
I'd expect these test to be the same or close to it if that was the case.
What we need to see are memory and hard drive benchmarks to determine if the 133 or 167 system bus and new DDR RAM gives any improvement there.
MacBook Pro 15" 2GHz Quad i7-8GB RAM-240GB OCZ SSD-750GB HD-OS X Lion
PowerMac G4 1.42GHz Dual PPC-2GB RAM-240GB OCZ SSD-OS X Leopard-MorphOS 2.7
PowerMac G4 Cube 450MHz PPC-1GB RAM-100HD-OS X Leopard
iPad 64GB Wifi/3G-iOS 5
iPhone 4S 64GB-iOS 5