I already realized that he did not provided a "proof", but bilker_76 or kozlodoev might have had some basis different than experience in order to put it in that way. I was looking for it.
The only evidence I have seen as "proof" is minutes played. Someone once made a vague reference to me that their starters play more minutes in a slower pace than in a faster pace.
However, I personally have attributed that to the fact that possessions tend to be longer in a slower pace. There are less stoppages in play and therefore less of a chance for the coach to make subs.
Also, consider the fact that the BBs specifically mention in the rules that full court press has an effect on stamina. However, there is no mention of stamina under the discussion of pace.
Run of the Mill Canadian Manager