The number of Pegs out there is fixed and not going to increase until the Peg 2 is released. The A1s, on the other hand, continue to dribble out and eventually will overtake the Pegs in population.
As for the numbers of users, they're unknown. Both sides can make claims of their registered users, but the true numbers are unknown.
I predict that the numbers are going to change dramatically when OS4 is released.
tony