I wonder if that DOS policy will be the same for the new North America data center. I have a beta server with them and am enjoying their service but taking someone's service offline for a small scale DOS attack may be a game changer.
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).