I frankly fail to see why there's even a debate about rolling versus natural bat usage. It's like abusing the daylights out of your car's transmission until it breaks, then taking it into a shop, saying, "hey, fix this, because it's covered." Should you be surprised when your mechanic tells you, "this isn't going to be covered, because YOU did it, not the car"? Not at all.
There's a difference between natural progression and being covered and deliberately going out of your way to "speed it up a bit."
I don't care if it's a Ford Taurus or not.