It's best to judge this build after having had used it. It does seem to be on the slow side. But would Apple make junk?
Besides, sometimes slower is actually faster:
http://blog.macsales.com/11825-when-slower-is-actually-faster
Awww there you go, ruining the blog with facts, science, and ACTUAL MEASUREMENTS which prove that today's 5400 HDs are faster than yesterday's 7200 HDs. Well I for one am going to ignore the truth and continue to whine like a spoiled gamer boy about the "whimpy 5400 HD".....Waaahhhh! Waaaahhhh!!!