Timbits isn't exactly a hockey development program, it's just for fun. Just because Crosby played Timbits when he was maybe 3 or 4 years old, just starting out on the basics of the game, doesn't mean it's a good development program. In fact it's not even a development program, it's just meant to have fun while teaching kids the basic skills of the game. Remember this guy gave his first newspaper interview at 7, so by that time he was already likely playing competitive hockey. You can't say that Timbits hockey is what turned Crosby into world's best hockey player.
That's exactly the point, to develop a love for playing the game for FUN! That's as "developmental" as it's going to get at that age.