Now that there are many more RT games, especially with the new chess clock, I believe there should be 2 average turn times calculated : 1 for RT, 1 for normal play. The time should be calculated by taking into account the time setting of the game. When I see a player with a 12 hour average, I don't know if this guy is a fast player or a player waiting 6 days to take his turn but playing mostly RT games.
Also I believe the average should be taking only the 3 last months (for example). Because if I was playing very fast 2 years ago, it doesn't mean that I am still doing it now that my life has changed.
Thoughts ?