Average stack question

[DOTTT]

I was wondering if there is any way to determine how fast an average stack should rise in a tournament. Suppose you have 500 players that start with 1500 in chips, with blinds starting at 10/20 and moving higher every 15 minutes (15/30, 20/40 25/50). Is there anyway to determine how much the average stack rises in the first hour, or does this just vary based on the players in the game? I hope my question is clear enough to answer, if not just forget it I might be babbling here.

Thanks.