My site was approved by google within 2 days. I thought I was really lucky and hoped the same would show in the adsense return but that was not really the case
Well my business account got approved in 6 hours flat....i think that is a record still held and had opened a thread for the same in DP
It depends on the period I suppose. Anyway, it doesn't take more than 10 days or so. Usually it's much faster like 2-3 business days.
There is no fixed time period for Google to do that. But it is not a time consuming functin for Google. 1 week is enough if your site has no problem.