nope The results are in and nearly 500,000 voting gamers have ruled in favor of Realism Versus becoming a regular multiplayer mode in L4D2! Democracy rocks!
Additionally, a new mutation has gone into effect today titled "Follow the Liter", which changes the rules to the Scavenge gameplay mode:
Only one group of cans spawn at a time, so survivors know exactly where to go. There is only one problem; the Infected know exactly where they are going.
"The Passing" DLC is required to play these mutations on PC or Xbox 360.