HEY! I'm a teenager, and most of that is fecking boring in a book, to be frank. Some colleges/schools are ok, but like Hogwarts.......er, yeah. 'nuff said.
So you can't be too biased on age groups.
Roight. Well, just don't be biased IMHO.
I feel inclined to point out that it's not so much "bias" as generalization -- what Elliot said does, after all, apply to most relevant individuals.