But in a response to concerns from Gamers-Underground, Gameservers.com claimed that "Treyarch is aware" of the situation, and are looking to find a resolution "soon".
According to Gameservers service representative Beau Young, the issue is due to "routing issues".
More info as we get it.
Gameservers.com respond to Black Ops lag complaints [gamers-underground]
Thanks to Jamie for the tip!