trap seems to be the one exception in terms of "EDM genres." had strong roots in the US but I do feel like UK producers like Bauuer, DIplo, TNGHT, etc propelled it into the EDM world (though i'm not very informed about trap at all so someone else should probably elaborate on that one).
edit: then again though, you do see trap being played on the radio and in stores like Foot Locker or anywhere really. I think the difference maker is lyrics. Trap has lyrics. Dubstep generally doesn't. House and techno generally don't. Grime does... so maybe that could make a difference. I don't see US kids getting into 2-steppy grime instrumentals though. The beats are way too intricate to make sense to the US masses. If "grime" got big, it would basically be halftime 140 beats with edm synths and rap lyrics - also known as, trap.
maybe there would be a little "grime" twist here and there but i doubt you're gonna have distorted pulse x kicks or eski sounds.