Ever since the 220mb/s limit was made (to prevent scores from "fake" harddrives - that don't display the real performance of the pc, either) people have been limited by it. Removing it is unfair, no matter how good today's HW is. I can understand it's frustrating that you have to make your HW underperform, but at least the rules are equal for all - not just the ones posting scores today, but also for those who posted yesterday;)
HWBot isn't all about the highest tech, you know... it's just as much about older gear.