Yes, since PyPy (and Rubinius) have JITs (like V8), that is the fairer comparison. Nevertheless this highlights just how helpful JITs can be for cpu-bound code -- makes me wish PyPy was more ubiquitous (and gets py3k support sooner rather than later).

And F# running under Mono executes in 0.950s and the code is shorter, where standard Python 2.6 takes 1m36s. This isn't about pure speed.