No but his statements arent right.
Tell me this had Schumacher not retired at the end of 2006 what would have happened? Kimi wouldn't have joined Ferrari and Michael would have won both the 2007 and the 2008 WDC in those cars. He was still a hell of a lot better then Massa in 2006.
The three year break has cost Michael a lot, he lost track of the developments and got out of the rhythem being in F1 and working on the car all day and every time. As Herbert said speedwise he is the same i also believe that, and the competition sure has got better but where is Alonso? Still fighting at the front and Michael was on equel terms (if not better) then Alonso when he retired. It's just a combination of things why it isn't working out like it can. Luck wise he hasn't had much ever since he returned, and when he does get the car to his liking he still is very very fast but it seems hard for him to get it just right.
There is no doubt in my mind had Schumacher raced until 2008 (when the cars were more to his liking and the we had refueling in the game), he would have easily been the World Champion.