So you wonder why you have greens bars and still have lag? That's because the ping bars doesn't represent that wel. With this mod we will change it. Don't worry I know we change a config, but you won't get banned for this one. trust me on that, iv'e been playing like this for months.
Original bars
So go to 'program files\steam\steamapps\common\call of duty modern warfare 2\players' and open the file config_mp.cfg
And change scoresping_interval from 100 to 20, and maxbars from 4 to 10 (10 is the max).
Save and start the game.
Then you see the REAL ping. Also you can easly spot the host ;-) (always 10 green bars)
So again, this will not get you banned ;-) Hope you guy's find this helpfull