I have serious doubts that MLP is bigger than PPG was after as many episodes. MLP popularity has been exploded by 4chan, and the internet makes things like that seem bigger than they are.
This may be true. I don't know a single person IRL who watches MLP (and I know several who watch Phineas & Ferb!). Some of the bronies are really obsessed with the show, though - to the point where they want to change their real names into Rainbow Dash. Never seen **** like that with PPG.
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Full rap metal jacket ~ Method Man