I bet it is very regional and authentic made in a lot of ways. I was not exposed to pasta like that growing up. It is not an Irish or German thing--The cream sure would be though! And butter, lots of butter....Nice carrier, looks good.
I like to make carbonara the non authentic way, with cream. Also, pancetta is a bit hard to find here so I usually go with bacon. About 350g bacon, an onion, 600g pasta and 2dl cream, some black pepper and two eggs. Oh, and loads of parmesan. I don't like melting it into the sauce though, I sprinkle it on top of servings instead.