McCarthy has won 70% of his games over the last three seasons. The Cowboys would literally have to flatline for McCarthy to lose his job. Even if the Cowboys have a losing season, McCarthy will be the last one to blame.
I can see 10 wins easily, particularly if this defense plays to it's potential. This season, the secret ingredient is Zimmer. I don't think he ever had a defense with this much potential. There is a lot he can do with two All Pro CB's and an All-Pro EDGE, add in another Pro Bowl EDGE.