Kirk, I asked Lisa (my wife) if she ever noticed what you were talking about. I figured she would cause she changes routines from the gym to running and back and forth. She said she didn't.
I noticed whenever I used to go to work in the heat, especially in powerhouses where it was super hot, it'd take awhile for my sweat machine to get going, sometimes a couple days. I'd be super uncomfortable till it kicked in, ya know?
Anyways, I asked just what you asked, and she said "prob-ab-ly". She just looked it up and found a quote that said "fit people's bodies cool off more efficiently."
So I think it's saying "You're on the right track, stud. Keep it up."
It probably makes sense that she never notices that halt in sweating, because she's super fit and never quits exercising. Makes sense.