Your numbers are, as far as I can tell, correct, however I feel like your conclusion that the PS2 is "kicking ###" is somewhat incorrect.
One reason for this is that, as you have said, the PS2 has a significantly higher tally mainly for the reason that it's had about a 6 year head start, and so a lot more people have one. If we divide these numbers by the number of years each console has been out, so as to hopefully reduce the offset, we see much, much smaller margins.
Another factor that I don't think you've mentioned is the PS2/PS3 relationship vs the Gamecube/Wii relationship. Granted, the importance here is not apparent at first glance. Allow me to explain:
When the Wii was released, I think it's safe to say most Gamecube users converted to the Wii. Your numbers support this -- the Wii scores much higher then the Gamecube on the given chart. However! When the PS3 was released, a good number of people decided not to upgrade, and stayed with the PS2. I'm not going to speculate on why this is, though it's likely that the price tag was a major factor.
The result of this split is that Nintendo has taken it's Gamecube players, more or less cut them off, given them the Wii, and thus split their player base between the two consoles. However, what we see on Sony's side is that more people have stayed with the PS2 then gone to the PS3, and so their player base is more centralized on one console, bringing their numbers for that console higher.
At least, that's how it seems to me.