OPMuk Reviews CODvita and they had something positive to say about it.

#1AjescentPosted 11/15/2012 11:37:21 AM
"Everything works well enough. During my time online, lag was happily absent like kebabs buffets at fat camp and I rarely waited more than thirty seconds to find a match."

http://www.officialplaystationmagazine.co.uk/review/call-of-duty-black-ops-declassified-ps-vita-review/

Accidentally posted this in the ps3 forum but it's more suited here to be honest.
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Waiting patiently for UnKarted to be announced since 4-Dec-2009
http://us.playstation.com/publictrophy/index.htm?onlinename=Ajescent