The problem wasn't lag. It was actually rather lag free for Sikpup and I.
The problem is that there are random disconnects caused by the adapter, which means you'd have to reset your connection (unplug it and plug it back in).
Sikpup is upset because the problem happens every few minutes for him and the XCM support forum mod would rather ban/delete complainers than be responsible for providing actual support. The problem doesn't happen too often with me (takes hours), but I'm still upset because I've been a third party witness to XCM's poor QA practices for their shoddy products and supportless support.
XCM claims that it's the console versions, but we don't know which ones since they haven't tested them

. I have a 80GB PS3, the one that came with motorstorm purchased about a year after PS3 launch. Sikpup if I remember correctly (correct me if I'm wrong) two 60GB systems (launch?).