What about this? For each player, show on his profile the average time games sat with him until he moved for the last 10000 moves.
(that means the time passed from when his opponent moved till he moved)

This would be very helpful to see which players typically delay tournaments and which not, so others could selectively weed some slow players out (or avoid them), if they care about their tournaments taking years.

For a player that comes here once a day, this would probably show 24h; for a player that plays more often, less than that.
For the typical 'lagger', it should be weeks.