I think its funny no one has mentioned medics yet.  Lets say a top 10 player is playing medic, they get killed once by someone who just got ranked and they loose 50 points.  They now have to get 10 medic assists to make up the points.  What happens when they loose 500 points on one death?  I rarely play medic, but at that rate I never would on pub games.  Just because it would be lame to loose so many points by trying to be a team player.  Its hard enough trying to hold on to points on tempest #2.  I can have a 3:1 K:D and still be loosing points out the ass on that server if the right people on the other team kill me.

Also I have passed a lot of people that have more time played than me on this server, so I think it reflects a bit more on skill than some people think.

You do realize a good number of people in the top10 are primary or secondary medics... including myself, ed, frags, sam, saber, i've seen leon play medic... If anything, I would suggest medics get points faster than most classes, especially if they are the type of player that runs away from a fight as soon as an uber runs out.  Crazy about points?  Be a medic :D.