AD simply makes every other linemen on the D better.
I'm pretty sure Kupp has also reached that lofty of a status.
When you have a WR that has a package of skills and brains like he has, who has won the triple crown, set new playoff records, just seems to get better every year, and simply cannot be covered one on one, it makes the other WRs better.
Robinson is going to have a HUGE year. Jefferson is now a top level #2 WR that can run any route, has displayed better hands than what we though when he came out of Florida, and has really good top end speed. Fully reliable. But, Kupp is the key to both of these guys' success.
I have no doubt that OBJ benefited from the Kupp Effect. I just hope he has enough humility to understand that.