"We have received a few posts as to whether or not players who purchased the 2011 BlizzCon Virtual Ticket should be receiving the 2010 BlizzCon pet, Deathy.
You all have posed an excellent question to which we are inquiring about now. We will update the thread when we have further information."
The above quote (click for source) seems to be a bit odd. They know people are getting last years pet, but they don't know if it's on purpose or not. I guess it's nice for the people that didn't get last years pet, but I am betting this is just a simple error and Deathy will not have a new home with this years ticket holders for much longer.
What do you guys think? Should Blizzard let people keep the pet if this is a mistake?