lol 15 minutes is a fast transaction time on the bitcoin network, you have to pay a fairly hefty fee to get it to clear that fast (last time I had to deal with the network it was like over 20 dollars I think, and that was over a year ago).

(This is for a single-block confirmation; many places require 3 to 6 confirmations, which adds another 20 to 50 minutes, on average, and possibly a lot more than that if the network is unlucky.)