That is my impression. Its like he had an adrenaline boost at the beginning like a call up gets for the first few games and then he wears down. He has been beaten on speed a lot lately. He has had other issues lately that might not be anything more than being destracted by his mobility problems.
There are three (maybe four) possible explanations here:
1) He's just slowing with age and this is as good as he will ever be, downhill slide coming
2) He's working through an injury and when healthy he will perform better
3) He's saving his energy for the playoffs and understands he doesn't need to give max effort on every RS shift
4) (Unlikely) He's just in doesn't give a crap mode
I think 4 is out of the question, and my hope is its 3, or 2, but 1 is also very possible. Thoughts?