Are the Intel Macs really 2-4x faster?

Enterprise Mac | InfoWorld | The Mac performance shell game | January 10, 2006 11:25 AM | By Tom Yager: "In short, Apple used multiprocessor benchmarks to skew the performance advantage that its Intel-based machines enjoy compared to single-core PowerPC G4 and G5. Apple used the industry-standard SPEC suite components SPECint2000 and SPECfp2000, but here's the catch: Apple used SPECint_rate2000 and SPECfp_rate2000. Both tests spawn multiple parallel benchmark processes and are specifically intended for comparing multiprocessor systems. Single CPU, or single-core machines do positively lousy on SPEC*_rate2000 tests. That's predictable and universally understood. Add a second CPU or a second core and, as you would expect, SPEC*_rate2000 performance on any multiprocessor-optimized test skyrockets compared to a single-processor box."

This guy obviously knows more than I do, but it seems that his information is correct. Doesn't seem like Apple was comparing apples to apples (pun intended).