A question with low priority queue.

I didn't know where to put this so i just dumped it in miscellaneous like everything else:P

So about a week ago, i was put into low priority queue when my game crashed, but i noticed that i had to wait 10 minutes to play a game. How come this isn't like the previous leaverbuster system, when we play more games without leaving, our leaverbuster rating thing would go down, but instead with this system, it just carries on. The last time i had been in low priority queue was about 2 months ago. Was the new system not designed to reset when we had enough games played, or was it intended?