In all honesty, you couldn't pay me to move to NJ. :P I used to live there and i visit there a few times a year but no way in hell I'd move back there. If playing online there meant i was making over 100 grand a year auto-piloting tables, i still wouldn't move there...I hope that didn't offend anyone....
But if you want some good hard stats on the action at the NJ online sites and a comparison to other online sites check out http://www.pokerscout.com/
I can't imagine the traffic is very high compared to other sites.
i stumbled across this site recently when i was trying to get some statistics on different sites. I'm not sure how accurate there info is or even where they get it from, but it is cool to look at and ponder.
To reiterate, I can think of a thousand places i would live to play poker, NJ is no where on that list...To each their own.