Spr1ggan, on 26 July 2015 - 05:51 AM, said:
I would also add that the amount of team killing is noticeably higher on the EU servers .
Yes, indeed. And these teamkills are usually followed up by "sry, i'm from NA and not used to such a high ping"

Well, lets get real, the servers are split for less than a week and the event ensures that the distribution of NA/EU players is roughly the same on both server types. With the majority of the playerbase playing on both servers, it is very unlikely that there actually a real statistical difference.
Any perceived difference is probably a result of a streak of bad games or some personal bias. To be honest im not completely free of this myself, i could swear that everytime i get teamkilled, it is done by an NA player who needs to "secure" the kill on an already disabled enemy. Of course that not the case, but i still perceive it this way, probably because they are more vocal about it in team chat.