I like the stats comparison they showed:
Cooper in six games with Oakland 22 receptions, 280 yards, 1 TD.
Cooper in four games with Dallas 22 receptions, 349 yards, 1 TD.
I know most of his production here came in this one game, but he actually had two 100-yard games before he was traded to us (10-116 against Denver and 8-128 against Cleveland). He hasn't averaged less than 11.6 yards per catch in any game for us so far.
BTW, if you extrapolate his four-game total for the season, it would be 88 catches, 1,396 yards and 12 TDs.