I agree with this, Mark isn't tough enough for the NY market. I could see him having success on the west coast somewhere. But the moping, it's terrible. And Eli/Mark comparisons are flawed for more reasons than attitude.
He isn't identical to Eli even aside from the attitude, but I think that may be a big difference as far as success/failure goes. The fact is that Eli has been (at times) just as sh*tty as Mark. Even recently he's made truly moronic throws - such as hitting Kerrigan in the numbers a couple of times, but he shakes it off and keeps heaving. FWIW, there were those that said that Tiki and Shockey undermined him and that until they were gone Eli looked lost, but Sanchez has to take control of the huddle if he wants to be the man here.