With all due respect I believe the biggest difference will be Chad Penny. Why? Because he has been healthy all off season and has had the chance to "connect" with our recievers better which makes both the recicving core and the QB better and more effective.
I am one of those who believed that our WR group was much better than advertized last season. Bess, Camarillo, and RB (BYW) have some of the best hands in this business and that core group along with Penny will only get better this year as their chemistry comes together!
And ....... it doesn't hurt that Turner appears to be the "real deal"!!!