Welker is a terrific punt returner, not an electric KR. He's very sure handed, shifty, and tough to bring down in traffic. He's not a breakaway guy like Hobbs (or Chad Jackson, soon perhaps?)
But the entire ST coverage and return units have been phenomenal all year. On Willie Andrews' TD return, a couple of players commented on how the whole play ran exactly the way they'd practiced for a kick of that sort. And the Colts were hard pressed to bring a KO past the 20. As a team, the Pats rank #1 in the league in KR avg, #6 in PR avg. Good stuff.