I'll give you the PCMark05 benchmark, but I've never seen faster winxp startup from RAID0. My home system has two 160GB WDAAJS's in RAID0, and my gaming computer has a single 74GB ADFD raptor, and the raptor boots faster. The home system has a 6600, and the gaming system has a D805@3.8 (I know, time to upgrade the gaming machine). Both have 2Gb RAM. The Raptor system is noticibly faster, 3-4 seconds at least, never used a stop watch on it though.
That's the greatest thing about the new Hitatchi drive, not only is it hugemongous, it's damn fast too. Cheers to them for not sacrificing speed for capacity and actually delivering both. Sure, not everyone has a need for such a big drive, but I'm sure most people could find a use for it. Especially for HTPC's or, well, huge chunks of the stuff the internet is REALLY for.....