As Lions fan (
I can attest that Perriman was a poor man's Wes Welker at best. He played a lot like Welker, but was nowhere near as good. He was a good runner, but didn't have Welker's quickness. Don't forget, the reason NE got Welker is because they saw how nobody on their team could cover him when he played for the Dolphins. He didn't need Moss then. And he had Joey Harrington and Dante Cullpepper throwing him the ball.
The main reason Perriman was so successful was because teams stacked the line against Sanders. If not for that he would have been a nobody.
I think most people realize how amazing Welker is, but you will still have people holding on to the stereotype because they've been so deeply ingrained.