Tried to play this morning (UK) before work, around 8am. I managed 2 games of TDM then struggled to find any other games. There was around 2.5k online on TDM but other modes were all less than 1k. Mostly less than 500. I gave up eventually. Considering 2XP was still live that's poor.
it's around 21k players. On 360 it's 50k. Yeah, that's not really a great number to be bragging about. BO2 has around 80-150K a day. Shows you people play BO2 than ghost. That's not all. MW3 is usually around 50K as well. I know this because I switch amongst them for fun.