I personally know many people in the US breeding and showing top show jumpers. They are private facilities focused on showing and do not have the need to advertise or to sell prospects. Many are not on a large scale, with a foal or two every year. But they are using very good mares and stallions.
Do I think we are breeding on the same scale as Europe, obviously not. But there are some very good jumper breeders in the country. Spy Coast has a very impressive breeding program. They are producing very nice horses. I know top riders/programs are breeding their mares to their stallions.
Also, as it was said in the Karen thread; it is not easy to breed an Olympic caliber jumper. I had horses for an Olympian to breed and one of his rider’s naively commented on how bad the program was since most didn’t make it to Grand Prix. It is not that easy! There are so many variables that could take a possible Olympic or top horse out of contention, as well as those horses just not having what it takes to get to that level or being in a home that has zero aspirations/skill for that level.