Are there any other options? Do some parents lie about their kid's age?
me-45, DH-46, ds1-23, ds2-18, dd1-17, dd2-14, dd3-4....hoping for #6.....
I know my sister-in-law is very happy with it as a site for him to use. Alot of it is games and stuff, but there is some social stuff as well.
At my house he has no unsupervised computer time. I don't know about what goes on at his dad's house though.
My DS is 11, his friends range from 11-13 and only one of his buddies is on facebook (and it's not the 13-year-olds.) Instead, they generally interact by texting (those that have phones or using an ipod texting app,) email for those who don't have access or through minecraft (one friend has a server for which they are the only kids on.) They all seem pretty satisfied.
I think your DS would be surprised to know how few of friends his age are actually using facebook even though it may seem that "everyone" at school has it.
Married mom, DD 18, DS 15, and a Valentine's surprise on the way!