Yes, although it's worth noting that they seem to have rowed back on this a little bit in their recent designs. The new MacBook Pros are cooler due to the processor being cooler, but they also have feet to allow better airflow under the machine at the clean flat bottom of the previous models (IMO they still look great, but I can't see Apple of a few years ago making that decision).
Their new CPU architecture certainly is more power efficient compared to x86s they replaced in many ways which means they aren't up against such a wall to compete on performance, perhaps a combination of circumstances have caused them to produce more thermally comfortable machines in recent years. I'm not sure how long this will last though... in that sense I'm sure they do have relaxed TDP margins, so i'm basically arguing about the subtlety of this not being an intentionally large margin... now I look like i'm splitting hairs :P but it's clearly a mistake from the analysis of the GPU.
