I will offer an insight as there seems to be some lack of understanding of Sporting in the USA.
I lived 45 minutes from 9 Sporting (NSCA targets) grounds/clubs. 3 were "professionally" run, and two of those were run by Pat Lieske. ( a FITASC and Sporting national champion.) TO suggest we "lack" target variety is myoptic at best. Many of our clubs have a vast variety of terrain, from flat to real hills. (One several hours away is built on an old SKI HILL and offers shots found at very few other places.) If I list clubs within four hours drive (an easy weekend) there are far more that throw STIFF targets.
In Texas the lads can shoot several different clubs registered shoots each weekend. And shoots at clubs around the USA may vary in difficulty, but if you look at scores "from proven BRITISH shooters" that attend said shoots, you will be hard pressed to say the targets are soft. Witness all 4 early shoots held in Florida every spring, starting with Doug Vine targets at South Florida, to and including the Seminole cup. There are regional and State shoots held all Summer long around our Country that offer testy targets.
One big difference I see is many of the "weekend shoots" held near me have far more targets offered than what seems to be the case in England. At out "trail shoots" (again Pat Lieske targets) we have a 200 target main event, a 100 target prelim, sub gage, 5 stand, and FITASC. And this is a local State type event, not a regional shoot.
While folks over there may get to several grounds and shoots each weekend, we also have far more targets offered per event (from the ads and results listed over there)
How many of your "weekend" shoots offer more than 200 targets? It's not uncommon for local events to have 300 sporting 12 ga (prelim and main) 100 super sporting, 100 FITASC, 5 stand and even "true pair" courses just for one event.
While some areas are known for soft targets, we also have many more that are becoming known for VERY STIFF testy targets. Houston Texas, Tuscon , Northbrook Ill.
Several in Ohio. So hard targets are becoming the norm at many big clubs around here.
I'm retired and have cut back in my own shooting, (I used to shoot 7500-8000 registered targets a year, and now that I've retired I only shoot around 3500 registered)
From friends that have traveled to shoot in GB, they think many of our clubs are throwing just as stiff targets as you get...
While our "internet" is full of fluff comments, major clubs in every state are available to a large number of shooters..
I don't know of any top shooters that aren't traveling the country EVERY WEEKEND throughout the Summer, shooting from one end of the USA to the other.
That is why Gebben, Derrick, and Wendel etal.(our other top pros) are winning.
We have many top club shooters(around the USA) that give the "pros" a run when they shoot anywhere at "local" shoots.