I think most people on this side of the pond have only heard of Twinkies from Ghostbusters
On my first trip to New York it was the first thing I bought, for that exact reason.
Other than that I didn't bother much with chocolate on my trips to the US. I was far more interested in Carl's Jr, In-N-Out Burger and the Triple Quarter Pounder with Cheese from McD's. You guys have so much choice when it comes to dead cow in bap. We get to choose McD's or Burger King and that's it.... unless you find a Wimpy that's still going.