I think my problems are on my end so I can't say much. Before it happened though I did notice server less lag than usual (I tend to notice server lag more than other players at most times because of my slow connection) but with my problems I'd need a longer time to see.
The easiest way I've found to test if its you, or the server lagging, is to simply type any text and see if it comes through immediatly or not. If you think the lag is server side, text will always send immiedatly no matter how bad the server lags (At least in my experience). If text lags, then the problem is at your end.