That's a bit hyperbolic....lol.
I haven't seen anyone claiming he is the reciever that he was in his prime. We were looking for an experienced #3, not a 1200 yd #1. I'd say he checks that box pretty well, and the cost was reasonable.
To your point, though, I have seen ppl purport that he still has top level speed, actually referencing his combine 40 time.
That is so not the case. He is no longer a burner that is going to run past Corners. He is, however, a good precise route runner. He knows how to read, and take advantage of defensive leverages and alignments. He has above average hands.
Obviously there's no way to demonstrate this factually, but I suspect his reputation and time in the league will get him the benefit of doubt on potential bullshit calls from many refs.