This is actually relevant to the points I made with the TF9 comparison I made earlier. One of the most striking comments/observations my son made was, the second time he wore them (1st profile after the initial skate) was in an evaluation camp where he wore the TF9s for two back to back games. This was a risk, but his Makos were hurting his feet so bad we didn't think he could make it through two full games, so, wanted one game to adapt before leaving the final impression in the second game. He had played a game the day before and could barely skate at the end his feet were hurting so bad. As I noted in my comments up the thread, he looked observably faster to me. I could tell he was unsure in them and playing conservative so as not to trip over himself, but still, by the second game was rushing full ice and jumping in the O zone.
Anyway, when he came out to the car, aside from the speed comment, he said he felt less tired after two games in the TF9s than one game in the Makos.
Again, not sure where the energy losses were coming from, but there certainly were energy losses. The Mako is a pretty darn soft boot.