Same issue, from what I understand it's accross all platforms so it has to be a server issue.
Lighten up guys, this game sold copious amounts (aprox 12900000 copies) so far. It's to be expected that something bad happens. I doubt the servers were stress tested for these numbers.
And rest assured it's a top priority to fix their flagship game which has faltered on opening week, to twiddle their thumbs isn't good for promoting BO2. So go watch some TV, play campaign, anything really while they get this mess sorted out (probably in the next 24 hours).