On the Black Ops forums, Vahn has stated that there are going to be updates for Sniper Rifles eventually. While he states that he doesn't like to talk about in-game sniper rifles very much, he claims that there is no intention of making Quick Scoping easier to pull off. He did, however, say that "We are evaluating the damage and hit box multipliers. Especially, if the weapon is suppressed" and that there are making the patch tunable, so they can adjust it as they go.
Heres the link to the post: http://www.callofduty.com/board/viewtopic.php?f=70&t=338961