A manufacturer wasn't the one saying this'd kill your tablet, it was Igor Stoppa, one of the absolute geniuses of the platform. Who, if he knows anything, knows this.
I think it's actually overvoltage in this case, not heat.
The OMAP3530 is a larger package, and thus able to dissipate heat more easily. It's also, now, speed-sorted.
Anyway, feel free to test for us.
Still If this will give me 15% more speed when i need it, via toggle and will make it live 2 years instead of 3 ( 1.5 years is when I would replace it anyway max ). Then ok.