Back to the question - US games, well, gun games anyway, are just wimpy for massaging easily bruised egos. I have a book written in the 30's that decries the shooters whining about the targets being too difficult and the practice of calling the pulls bad to avoid a difficult target (a practice only recently falling off due to the microphone releases many clubs use to cut costs). The current two-hole trap targets are the latest manifestation of the wimp. Ever wonder why the old trap machines even had five holes??? Pre-mounting is the least of the ills of US trap and skeet. The single biggest thing wrong with the games is the average based classification system, which sporting has adopted as an add-on as well as pre-mount. The adherence to the Holy Average is another sap for the delicate egos and is effectively meaningless. A simple cure would be a win based points system like most major sports, but we all know when that will happen.
rant off
Dr.WtS