If you run out of time and your opponent doesn't have mating material, you don't deserve a win, so you get a draw instead.
If you were suffering from lag, then you might have had less time than you thought. I guess you shouldn't have wasted time getting so many queens when just 1 was enough (maybe get two, since that makes a really quick and easy win, but 4 is just wasting your and your opponent's time, to your detriment in this case).
I was playing this live 5/2 game the other day.
http://www.chess.com/livechess/game?id=1079441224
Since I had a lot of time and the opponent was moving his king around in circles, I was having some fun promoting 4 queens. You know, one of those days.
To my shock, the game suddenly ended in a draw with "Insufficient Material". The 50 Moves rule also doesn't apply since I'd allowed for a couple of pawns to be captured.
Can somebody explain what happened and help me reclaim the win in this game?