I fly out of a small-to-medium-sized airport in Canada and I've never seen it happen there. The idea of one person being responsible for both tower and ground in the busiest airspace in the US is absolute insanity.
Lots of pilots here have been complaining for years about how the US controllers are so much better, they can handle much more traffic, etc.
Edit:- It's Atlanta.
The airspace that combines JFK, LaGuardia, and Newark, is the busiest airspace in the US.