Sanchez has a lot of talent around him.
You forget, the jets have basically an all-pro left side of an offensive line (Ferguson,Faneca, Mangold at Center), two very good running backs in Thomas Jones and Leon Washington, a good young tight end in Dustin Keller, and a game breaker in Jericho Cotchery.
Keep in mind, the only thing that stopped the Jets from making the playoffs last year was Brett Favre.