Disagree with this completely. He's been better these past two seasons than the previous 4 seasons before that. His points per game has increased and he was on his way to shattering his previous point total record this season had he not gone down with the injury in December. Zetterberg was making headlines mid season due to his point tally and at one point was closing in on Crosby; until the herniated disc occurred. The season numbers speak for themselves and last years run to the playoffs do as well.
The "C" on the jersey has brought us a new Henrik Zetterberg. He is no longer only a "euro twin", he's the leader/veteran of the one of the most successful franchises in NHL and he knows it. He gives it 120% night in and night out because he knows he HAS to. In fact, in one interview earlier this year, he mentioned that part of the reason why he had a good start this season was because he started his training earlier in the summer. That shows commitment and will. I guarantee you he will continue to excel as long as his back allows him to. He knows in his mind he has to continue the Yzerman/Lidstrom leadership in Detroit.