Heh, not sure to be honest, pepsionice.
All I know, is that the wife and I have always enjoyed them and get a few when they do come on sale.
It is my favorite fastfood menu option of any place, but I get lectures from my health conscious wife each time I buy it. I do believe the sauce could be done with less sugar content.
In Germany, it’s the last pork item generally left at any of the big name fastfood places.