Somebody on the Gateworld forums (I was not on them, mind, because they are a travesty- I was googling for the SGU cast list) pointed out that the average age of the cast members on SGU is actually higher than SGA- but that's because three of them are in their forties and the other six are like twelve.

I'm still a little weirded out that one of them is Gerald from Hey Arnold, though.

Man, I've never consistently watched any portion of the Gateverse as it aired, and I get the feeling this isn't going to make me start.