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.