Definitely a valid point, that benchmarks can be misleading and real-world code is more important. One complaint, though - the tested browsers are all released

Definitely a valid point, that benchmarks can be misleading and real-world code is more important. One complaint, though - the tested browsers are all released versions, except for IE10. Why test a single unreleased browser, and not unreleased versions of all the browsers? With the unreleased IE10 included, it comes out fastest - but then perhaps other unreleased browsers would have done better. Ignoring IE10, which would have been more fair, Firefox 4 is the fastest, closely followed by Safari.