I can see acasser on the leaderboard now. Never thought I'd see the day, lol. (EDIT: Well, not anymore. It updated again and I guess he got a kill and moved up.)
You might have noticed that the leaderboard thins out a little bit once you get into such lofty territory. When you get multiple kills between spots on the leaderboard, your trailing me by 10-or-so kills isn't so much of a much insofar as ranking.
I suspect Nate can see much larger differences in kill counts on his page of the tablet.
(EDIT: Yes, I got a kill and jumped ahead of one of Asgard's accounts. I'll need at least two more kills before I move up further, however.... the next two in line have a kill and precedence on me at the moment.)