Now that the Windows 7 beta is out, the benchmarks are coming fast and furious, and while 7's been previously found to best XP and Vista during "real-world" tasks, it looks like XP is still the outright speed champ on current hardware. That's at least the word according to InfoWorld, which pitted all three systems against each other in a suite of tests designed to suss out how each performed on modern multicore systems, and while we won't pretend that to grok all the data, there's nothing complicated about the final results, which showed