Huh. I don't think I've ever had Google "ask" me anything. I have seen the "busy or not" graphs on stores when I'm checking to see if they're open, but I always thought that was just some average based on something the owner of the store might provide himself when responding to the "Is this your business?" thingy in the reviews. Generally, they tend to be busy at the times I'd expect them to be busy, anyway.

And now that I do think about it ... can phones sense other phones around them?