One of my pet peeves is how reviewers tend to only test the last revision of hardware when doing benchmarks. It’s nice to know that a new revision of this video card or laptop is 5% faster than the last revision, but I really want to know how it performs against gear from 2 or 3 revs back. Not everyone buys new gear at every revision.
If you’re looking to make a decision on Mac gear, check out Primate Labs results using Geekbench 2. Good info there, and validates my gut feel on speed.