Do you ever call this?

[Little Jimmy]

It's interesting that this topic came up. I was doing a game on Sunday where this exact thing happened. Pitcher sets up with pivot heel on top of the front part of the plate. Her forward motion always rocked her foot into the hole 3-4 inches in front of the rubber. She actually pushed from the hole.
I didn't call it because I honestly was confused. But after reading Roger Greenes' post I have to agree with him. Fed book shows an example of a legal pitch doing the same thing. I'm assuming they don't expect the girl to push off with her heal only.