There was an update in the GW2 forums that has said blah blah blah number of accounts were banned = whatever percent of the population which worked out to be about 4 million. and it was a couple weeks old at that point.
also they had to stop selling digital copies for most of sept/oct because the servers were overloaded.

dunno how many WoW players are still around but, my guild is very active and all members from our start are still playing. we're in the 8th or 9th or so ranked server in NA.