This is A real issue

[George]

I've not looked at Diablo specifically, but I do know that some (if not all) responsibility is server-side. Sadly, our recent update has not fixed the problem. As with before, high IDs have high packetloss and subsequently warp a lot. I have a low ping which hovers around the 30 mark, I was a passenger in another crew member's car just yesterday of whom has a lower ping than I do (20) - it felt more like we were teleporting around the map rather than driving. My point behind this is that ping isn't necessarily the cause of seeing a player lag, although, like you say, his ping seemed OK. I wish more than anything else that we could get this problem resolved, but diagnosing the cause is proving tricky unfortunately.

Did you look at his FPS? You can enable this with /my playerinfo on