It is a standard Winco 16-8 stainless steel SPJL-404 pan. It was flat when I placed it on the glass, however the first "ring of heat" at the very center caused it to warp almost immediately and pushed up the center where the temperature sensor is located, as the pan is very thin. And then it just snow-balled. Had there been a liquid in the pan to dissipate the heat, it might not have happened. I will try again! What I think I've noticed is that my thinner (cheap) cookware boils water faster than the thicker gear, but I haven't timed it yet to confirm.
One other thing I've noticed is that it will overheat and turn itself off, if/when the ambient temp is in the mid to high 80s (located in the caribbean so its always...) and you are heating a few quarts of oil. The fans on the bottom side need to be upgraded to push more air. So we've been supplementing them with a fan on the side. This is separate from the annoying problem of going over 392F on the dial when using oil probe control and having the unit switch back to pan control. Even so, I would replace all of my gas burners with these if possible.