My COD4 ping goes from 250-999 and has done so for atleast 5 weeks.
NTL used to be the best for pings now its the worst on UK servers.
Last week I hard set ntl modem 250 and PC nic to 100mb/s and my ping dropped from 400 to 40 immediately and sayed that way all night. Have not re-tested this week. Will post back.
But its saturday morning and I'm getting 150kbs/150kbs using speedtest on my 4mb line.