Stupid IW, I was in this lobby and the lag was real bad, I traced everyones IP and there was guy from flipping Ireland and Canada!!!!
Update: IP located in Ireland is Demonware server, stat tracking etc. Should not be the cause of game lag.
http://gaming.wikia.com/wiki/DemonwareAnyway GF rules set up for local port 3074 and remote ports 1-65535, I think this might be the ticket due to the random ports on the other end!

My sons XBL actually expires tomorrow and he wants to renew so I will get screen shot of us both playing.
I also noticed with these screen shots anytime port 53,80,88 are on the remote end, it shows a random port for the local side. So I would think if you are going to add any of the other ports to the GF rules, you should change the local range to 0-65535 and keep the remote range to that specific port (80,88.53).

65.55.42.52 Microsoft Hosting IP address state: Washington
209.170.124.205 IP address country: Ireland
ISP of this IP [?]: Telia Network Services (see update above)
75.158.71.184 ISP of this IP [?]: Telus Communications –Canada 
24.9.12.215 IP address state: Colorado ISP of this IP [?]: Comcast Cable
209.105.191.82 IP address state: Ohio ISP of this IP [?]: Fairpoint Communications
72.14.116.23 IP address state: Oregon ISP of this IP [?]: ISP Alliance Organization: Crestview Cable Communications
97.94.179.59 IP address state: California ISP of this IP [?]: Charter Communications
68.7.36.97 IP address state: California ISP of this IP [?]: Cox Communications
71.212.108.244 IP address state: Washington ISP of this IP [?]: Qwest Communications
97.113.10.216 IP address state: Washington ISP of this IP [?]: Qwest Communications
71.207.72.109 IP address state: Pennsylvania ISP of this IP [?]: Comcast Cable
174.134.252.211 IP address state: California ISP of this IP [?]: Bright House Networks