Let's see if he has the commitment to reply:
http://callofduty.com/board/viewtopic.php?f=71&t=270494
Okay, so we're all a bit sceptical at the moment over this VAC choice and based on the performance of other games rightly so. VAC has it's advantages but also has it's disadvantages, so does PunkBuster but it is the 'known' for Call of Duty Anti-Cheat. Hopefully this thread won't turn into a descending war over those.
One question, and I think you owe the PC Community an honest and upfront answer. You've made a fairly bold statement/promise and we want to know that Treyarch is prepared to do what is necessary if the time comes:
If Treyarch is really serious about protecting the integrity of this game from hackers and cheaters, and VAC does not work out - will Treyarch ditch VAC and change to PunkBuster?