I'm pretty sure there was a more thorough thread about how high ping doesn't affect the other players somewhere in these forums.
But I do agree, like said before, that it can make the person a bit harder to kill in those teleportation scenarios and that mostly it just makes for the guy with high ping to kill anyone else (from bullets taking ages to register all the way to throwing frags from a position you were at a few seconds ago).
That's nonsense, as someone who is far away from both europe and US, and plays with WiFi, I can assure you that high ping gives you no advantage. I see people pope out infront of me out of no where, and many times I get killed before I even could see the guy because of my lag. The person infront of me have always about half a second to shoot first, and the only chance for me to kill him is if is very slow or didn't see me. On 82d server I once surprised two guys from the back and shot a whole AR clip on them from zero distance, I don't think a single bullet hit them.