No idea. Though I usually browse to an area that I want satellite view from and then I zoom in on several levels. It's enough to make the screen show those big pixelated boxes as the upper right hand pop up box says "downloading maps". And it takes a while.

Hmm, I suppose I can measure it with Conky. I'll reboot sometime and go to an area I haven't downloaded maps with yet and see how much I can wrack up before this ban kicks in I guess.