Hello 
I am a community assistant on The Student Room!
Yes, we do have a couple of successful American applicants lurking around. They are usually concentrated in the university threads. If you post something like “is there any American offer holders/ applicants around?” usually there will be a reply or two if the university is popular with students across the pond.
@alcibiade mentioned that TSR is far more useful for students who want to apply to universities in the UK. There has been an increasingly larger international community (like myself) on TSR but it mostly consists of Brits. -P.S. you are on TSR quite a lot as well because I’ve seen your posts if your username is the same
@collegemom3717 I am the new community assistant on TSR for international study and I came on CC to learn more about the American system and how it works in terms of university applications, so I hope that with me onboard TSR will be more familiar with the intricacies of the American system in the future
Hope this helps