There is definitely button delay in my opinion unless the animations are really that bad, but I've pressed buttons and nothing happen, I've also pressed and its take longer than it should to happen, I've also had no delay and what seems like perfect gameplay.

Earlier I finally experienced a sluggish game of squad battles, it was extremely slow and poor to react and obviously very noticeable to usual play for me.

I use wired and pay my own bills so know exactly what connection I have and I highly doubt its that, the company I use even told me its overkill for gaming.

For me there seems to be 3 levels of gameplay;

1. This pathetic slow slugfest which is borderline unplayable
2. Occasionally a bit slow but playable
3. Near perfect (rare, usually at non peak times like 7am or late evening)