It could have some connection with gaming tho, because the day I bought this MacBook, 10th of December, I have bought also The DOOM Game and even though I don't game much, I have installed bootcamp and since I am huge DOOM fan, completed it in less than a week. That was my first game on computer in a while. Some time after, I was just occasionally playing multiplayer, and started noticing it. It definitely wasn't like that from the beginning and the MacBook isn't still even one month old.