The Arms megathread had a couple posts pointing out how the damage or the overall dps seemed lower. Don't really know about that, way too anecdotal to be of any relevance.
So I asked my true and tested AJ bros, to see if there's really some truth behind those reports.
Yes. overall arms damage in PvP is low. Burst inside CD's when you actually have uptime and aren't forced into defensive, is ok,