The new performance drives score well (35-37 MB/s), but cannot beat the three drives at the top. Please also take a look at the minimum transfer rate. This number is important for all kinds of streaming applications (audio or video editing). Currently, Seagate's Barracuda ATA IV is the fastest drive in this respect, not dropping below 23 MB/s.
Disk Access Time
Three drives are at the very top: The DiamondMax Plus 60, Fujitsu's MPG3204AH and the IBM DeskStar 75GXP. Our newcomers take the positions 3 to 6.