defending zone center has to put his stick down first then attacking zone center puts his stick down. what Couture is saying is Crosby isn't putting his stick in and just swiping after the defending stick goes in and puck drops. technically you should be booted from the circle and it happens all the time. that said, every center cheats in a myriad of ways and every center is trying to "time" it.
legitimate complaint, he should be booted. but this is just gamesmanship. happens every series, players and coaches lobby to make sure refs are noticing things.
in summary, chill out Pittsburg. no one is planning an asterisk.