PokerTracker at 10/20 and 15/30 LHE

[motorholdem]

Hi Folks

I was just looking for some input on the following:

Let's say you pick a randon 10H table at 15/30 Party/Empire.

How many opponents do you think would likely be using Poker Tracker (and playerview). I was thinking 2 or 3 out of 10, but is that too low. Is the usage higher?

Also, how do you see the prevelance varying at other limits
1/2
5/10
15/20
30/60?

Thanks