I saw tons of level 10 and below on yesterday, too!
That can be a good thing though. It depends on how they're treated when they play C3. If people take advantage and just noob stomp them, they won't last long. If you're playing, take it easy on the noobs and teach them some tricks to stay alive.
Granted, from what I saw, some of them don't need much help. They were doing well holding their own. (Maybe they played C2 or the C3 campaign?) Just take it easy on the ones with almost no playing time. I saw a level 1 yesterday with "0 mins 0 secs" of play time! Probably just got the game on the Xbox sale. I joined his squad to help him get a Squad Challenge completed. It was cool!