Why does it take so long for Software Update in OS X to tell me that I'm up to date? I'm currently running 10.7.2, but this has been the case for all versions of OS X I've run. I just performed a check, and it took three minutes to return.
I can't think of any reason why it should take so long. Isn't it a fairly quick lookup of applications and versions?
By contrast, the same function in the iOS/iTunes Store and Mac App Store takes almost no time.