343i just revealed that they measured the pings during the beta and they are still doing it. They say that 95% of players has <100 ping. Well, since im playing, 5-6 matches from 10 is laggy for me or i dont have any hitmarks. When it runs smooth, my kd is 2 and above but when i notice something, a barely have 1.0 kd or less. I think its not 95% lagfree gaming.