I think you are all blowing Moore's words out of proportion. I think when the new kid comes in under center all the veterans on the field feel protective and get an adrenaline surge. Then if the kids plays well for a series or two they all feel like they've upped their game and the surge is maintained. At least that's my take.
I don't think they do less for Mark or Tim, I just think they are able to perform at a higher level for Greg at this point.
Have you ever worked for somebody who was incompetent? How hard do you work for somebody you don't believe in? If you know your leader is going to let you down eventually how hard are you going work for them? This is the situation Mark Sanchez is in right now. His teammates don't believe in him no matter what they say. Once you reach this point you are finished as a leader. If you are in charge you absolutely must not let your people down. MUST NOT let your people down... EVER.