I don't get any of those problems on Karoo.
A game as big as Black Ops would not let hit detection bugs go on for this long. The hit markers not coming up straight away is down to ping spikes for sure.
hundreds of thousands of people complain about hit detection, they have had several patches to fix the problem, but never to fix frame rate issues. all 40 on my friends list also have this problem, and some have fibre lines. its a well known fact that the game is broken, just type in hit detection in youtube. If its ping spikes, then why does MW2 and other games play flawlessly?