I have been having terrible lag, especially during PvP, for the last week. I play on my brand new ipad with strong wifi connection. Never had lag before. I stopped mentioning it though because it seems we just keep being told to work on our connections etc because it must be on our end. Definitely isn't my internet connection!

ETA: It's worth noting that although my ping is slightly higher than it used to be it is still low (300ish), so my lag doesnt seem related to that.