Kills are easier to come by on deathmatch servers. DM servers train you in aiming and speed. Normal servers train you in teamwork and survivability, GG trains you in weaponry, zombiemod trains you in spray pattern identification and spray control.
I know it's late for replying to that post of yours, but seriously, that's epic win. exactly what I think too.
On topic: ss from two games I play atm... I'd show one from css but I can't play that atm =(