| All the sites I've seen, including Anand, have generally found that RAID0 doesn't offer more than a 3-5% boost except on linear reads. Given the length of time that the drives spend seeking verses the amount of time they spend reading, that's hardly a surprise. Measuring throughput is all very well, but isn't at all typical of what a desktop does! Storage Review have a good article on how they test along that hits on typical access patterns.
Move to tagged command queueing and a multiuser environment, and the story is very different. RAID0 and TCQ show very good performance, it's just that it doesn't benefit single user machines.
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