The teenagers you see outside the studio, in the studio and everywhere else that the idols show up are just that: teenagers who would actually bother to be there (well them and OT)
HOWEVER - the show is watched by SEVERAL more people then 10 - 17 year olds...all these stupid reality shows are watched by *older people* Survivor, Bachelor, Bachlorette etc...
BUT (there is ALWAYS a but) are these *adults* going to phone is frigging 50 times for their favourites?!? Most of them? Hell no...the teenagers? They are calling for 2 hours straight for their favourites...
hence the reason that although there may be JUST as many teens are there are adults watching the show...then teenagers' votes will ALWAYS win out - probably like a 10 to 1, if not more...(why the heck else was Justin around till the end last year?!? Tymara SHOULD have kicked his butt, but HE was a hot young N'Sync type guy...)