A New Digital Divide

I was chatting with my sister the other day. She is a 4th grade teacher in an relatively affluent community just north of C-bus. I'm sure 90% plus have home computers.

Self: what are your kids fave inet sites?
Sis: (starts blabbering about a bunch of math education sites...)
Self: stop, really these are the favorites?
Sis: yeah, a lot of the kids don't know where to go online so they ask for suggestions. after i tell them bout a site they use it all the time.
Self: this cannot be true of all the kids, don't you have my spacers?
Sis: they are too young for that, but i do have some kids addicted to youtube... that cannot be good for them.

In a nutshell, she described two types of kids -- the "youtubers" and the kids that don't know where to go online. I wonder if parents have created a new digital divide not based on economics, but purely on exposure to the Internet. Should 4th graders be youtubing?