If you are playing this game with high ping, major issues start appearing. These are Lag Compensation, the delay of kills like being shot impossibly around corners etc;

Client Prediction Errors, teleporting back and stuttering movement(not FPS);

and with really high ping, connection Jitter(also with loss) which can contribute to really nasty effects that aren't always very clear, and the feeling of bugginess.

Here's how to avoid getting into laggy matches. Apparently the devs think a ping of 800 is acceptable. For example, I just got matched into a 1 vs 1 SqVSq game from Sweden into Australia. Anyone can fix the lag by themselves.

Open up the folder ...\Steam\steamapps\common\Call of Duty Ghosts\players2\ folder and open the MP configuration file. Find the line that configures your maximum matchmaking ping and change it.
Default is 800 ms ping, I changed it to 200 ms. Don't be afraid anymore that you will be e.g. matched against some host in Australia if you live in Europe like me!

Keep in mind, this is your ping, not your latency. A latency of 50 ms would equal a ping of 100 ms.
A good rule is 100 ms = within your continental region.

Since there is no way to see your actual ping in-game, this is our only control over our ping to the hosting server. So set it to your maximum preference.

NOTE: You shouldn't really edit a lot of settings in this file until more official documentation comes out from IW.