the favorite weapon thing is in regards to how long you have a weapon out in minutes. I used to use my L96A1 2 prestiges ago (now I rarely snipe), and my playercard still says its my favorite weapon even though i've got 4000 more kills with my AUG.
WAOW. I used to China Lake only because I got 100 kills with every gun, and it is crap. Takes so long to fire and reload and aim, and if the guy has flak jacket you need a direct impact to kill him.
If that is legit that guy is a BEAST.
Although admittedly I'd get pissed off if I got noob tubed too many times in a game.