It probably won't change. Their US routers do not appear to be any different to the EU ones (e.g., they both intentionally rate limit ping to them so you'll see a lot of timeouts).
I believe (not 100% sure) they put their anti-dos on these routers which is why I think the US servers will have the same anti-dos measures.
Have you tried asking them? I do not believe they would hide this fact (it would be interesting to know whether they mark it as a selling point or not).