While I agree that many US breeders wait too long on youngsters they are disadvantaged by the price tags of horse shows. Get your baby out to some of the bigger venues for experience and exposure to BNTs and you are pouring big money into the process.
As far as the green situation, my background is in racing and in that area there is complete reciprocity between countries. I cannot import a proven winner from Europe and start him back over in maiden races just because all his races overseas were on grass, and now he’s trying the dirt. I could plead that he’s always lived at a trainers yard and shipped to race and now has to live on a backstretch in the shadow of JFK but to no avail. Of course because of the betting, racing is better policed. Registration papers must be in the racing office when and wherever a horse races. ID is verified before each race. TBs are DNA tested, tattooed etc.
in this era of technology, it would seem that tracking the true identity of a registered horse should be possible. As far as the rules, it seems stupid to me that a horse could be eligible for pre green on Dec 1, proceed to show at 3’6 (say in juniors or A/Os ) and yet retain its pre green status through the show year. It also seems like the USEF is willing to hand out reinstatements like candy.Also, a TB that leaves the track as a late 5yo and spends the next next year freshening, learning to jump, maybe doing some little locals would be hitting the pre greens at 7.