I haven't experienced any ping-related dysfunction in Black Ops 2 multiplayer yet, but to stay safe, here's a quick tip which may improve your matchmaking connections.
Think your broadband's rubbish? You're probably right. UK telcoms regulator Ofcom has released its sixth report on average connection speeds in the country it found that while the average download speed has increased a small amount since May last year, to 7.6Mbps, ADSL customers on packages advertised as 'up to 24Mbps are getting just under a third of the expected bandwidth.
Shockingly, more than a quarter of customers (27%) are on connections slower than 2Mbps.