Irritation level: EXTREMELY HIGH <-- I don't blame you.
You should be seeing no issues on MW3, your connection is meeting the minimum requirements to play the game without issues.
For Black Ops 2, your connection is quite slow, which is why you're having issues. What ports did you end up forwarding from our list on the article you linked?
Hey I was having similar problems to you. Do you have cable or DSL connection? If you have cable and i think it works the same for dsl, call ur cable company or whoever you get ur internet through and first have them set up a STATIC IP using ur gaming systems MAC ADDRESS. Then have them set up a DMZ ZONE, sometimes called DMZ HOST, with your STATIC IP you just created for your gaming system. This worked like a charm for me and I hope it helps you because It is wayyyy too late in this games life cycle to be having the issues its having; I hope Activision and Infinaty Ward take good care of these bullshit issues on GHOSTS. Any way basically this does what flava sayd in his comment above but is just a step foward as now all your ports will be open, you bi-pass your firewall, and have a freeflowing connection to your gaming system. Again I hope this helps.
53, 80, 88, 1863, 3074 and I put the xbox's ip in DMZ (When I followed the instructions as outlined by