Nope think you are wrong, but in any event it doesn't change my overall point.That is complete nonsense. The rate of mutation remains exactly the same.
The basis of my statement was an article about mutation rates in fruit flies, which I read a long time ago. Because fruit flies have such short lives, it's possible to induce and track mutations by stressing their environment. The article stated that as their environment got stressed, the rate of mutations increased dramatically.
You can argue otherwise. But it doesn't change my overall point, so it's a side issue really.