What did the last patch do anyway?

Beacuse when i am host, which seems like every game its more Laggy than black ops was.

Been playing Kill confirmed this morming, and i have to keep backing out of games because the lag is so bad.

For example playing in a game as host, and i couldnt hit a barn door, and was 0 kills 5 deaths rage quitas i back out host screen pops up.

Match making puts me back in the same game, with someone else as host 28 kills - 0 deaths.

Why am i being shafted for having a good internet connection, and does this mean i can only go into game that have already started.