I folowed the instructions, it formated fast etc.. but the **bleep** xmb laggs a little bit. its not noticible but its not as smooth as it was prior to the upgrade! WTH is going on here?
Western Digital Scorpio Blues are designed for laptops and other devices where power consumption must be kept very very low. Thus they have very aggressive power saving features. This *might* cause lag and slowdown depending on what you do with it. Users from AVForums even reported playing video on the PS3 stutters because the drive is taking a quick snooze to save power.
That said, if you can exchange it for a Scorpio Black, which has none of the power saving and has higher performance, go for it.