Two minutes is a time frame i seem to remember from somewhere i.e. if you've loaded a page in the last two minutes you show up.

update: then again I could be completely wrong. having read misty's post below, I think she's right.

Nuance

Baldrick, you wouldn't see a subtle plan if it painted itself purple and danced naked on top of a harpsichord, singing "Subtle plans are here again!"