the situation like in AK monday, at Demon Wall where after got hit by rebel but you dont see your char got push back and then you begin to move to the side and then sudden get push off the wall, that is lag (can prevent by not move for a while before move to side again but it is not in the topic)

and the situation where you stand in center of WoTL and begin to move after see the plume under your feet and got hit after your char is out of plume, it is not lag - or it is lag but everyone have that issue, not just 1 or 2 persons but many so I no longer conside it as lag