I agree with both of you on that front very well said!
K/D really doesn't matter in the slightest, I think so many people have fooled themselves into thinking K/D ratio is a measurement of how good a player they are. But how many people now camp for their K/D? Waiting in an unsuspecting corner for some unsuspecting player to run through to get the cheap kill whilst throwing IED's everywhere to get a good K/D is completely different from a player who tacticly runs around the map, helping his team out, playing objectives and winning the game whilst having a good K/D. . . and it's quite obvious that if these two players were against each other, the latter would run rings around the former without really trying even if they had the same K/D. Good players don't need to think about K/D.
I personally have always had a thing for accuracy, because I believe that shows how efficient and quickly I can kill. I like having a good accuracy, but it never stops me spraying when I need to. I have a good accuracy because I am an accurate player, not because I'm trying to.
Anyways. . .
To help the OP: There are leaderboards for overall stats such as: Score, Kills, Wins, Accuracy. These leaderboards are based upon your entire game play, regardless of mode, gametype, gun, total kills etc. There are also individual leaderboards for each game type, the stats included in these leaderboards only show your performance in that particular gametype. for example: your overall kills could show 7500 but if you got 200 of those kills in TDM it would only show that 200 in the TDM leaderboard.