Nope, Gronk and the Hernandez are go to guys in that offense. The offense is now built around their abilities. Moss used to be the go to guy. Welker, despite being a stud, has never been the designed go to guy. As described by others above that I linked to that actually cover football unlike your teckie for dummies link, Welker is the Ultimate Safety Valve.....or as another described, he has transcended the safety valve role. His role has never been and never will be that of a go to guy. But in the teckie for dummies world, he catches a lot of passes, so i guess he has to be a go to guy......