My thoughts are it feels about as fast as a new diablo 3 character does, at level one, and that certainly looked like some sort of beginner level to me. Later parts look much faster, during the raid bosses and the like. It's not just a D3 clone though, so it's more MMORPGish then D3 is.
Steparu had an article about it with some more info:
http://steparu.com/previews/mmorpg/2...nd-information
Translated Developer Q&A: http://www.lostarkdatabase.com/en/bl...wers-media-day