I know to most this doesn't sound right, but I read EXTENSIVE documentation and looked into it. Apparently from this company called "stoptech" my friend showed me an article from them. It was nothing to make them money so they gained nothing from doing this, they basically explained how pad residue at very high temps "transfers" and it actually is the pad material transferring unevenly when the brakes are not bedded in right that causes "warped rotors", because cast iron simply does not bend like that, it would have to be so much hotter than what they EVER get to to warp it would be insane. What happens is the surface of the rotor infact "warps" from the pad material burning on. To note: When I first put on the new bendix rotors and pads, you can tell that new color to the rotor. Well when I went out and broke them in (As stated how-to above) and came back, you could even SEE the transferred pad material in an even fashion across the enitre rotor...it was a glossy silverish color from the ct-3 ceramic pads. Feel free to investigate through the brake company called "stoptech" I believe for more info.
Oh and JR's3800...yes...cooling off insanely fast is not a good idea either (from rain, etc), that too can cause the material that is hot on the surface to cool off and harden unevenly, then you hit those brakes and it transfers onto the uneven temperature surface and yeahhh....
And as far as cutting, you are right, no conventional cutting method can fix certain instances of uneven rotor, my friend had stated there are few places that do this certain way of cutting down other than normal, I'll ask him tomorrow and post the name of it on here, cause I could have swore he told me about it, and that way would infact fix any issue.
This is all from what I read, and a month-long debate with my friend quite a while ago before I did my brakes, because I too never believed that rotor "warp" as it is called really isn't what they say it is. Everything I say here is a result of that month-long debate and research involved in it. If you can look into it and find anything different, hell let me know if it'* proven and I just re-won the debate with my friend lol. But I don't think that is happening, this debate went on for what seemed forever. Everything said here also fits consistently with how brakes work and warp. Ever since I bedded them in right, I have come to horribly fast stops, been through the rain, and whatever else...and really have not noticed any warp yet.
I edited this post with the link to all about "disc warp" and how it'* uneven pad material.