Some people even laugh at WoW in general, because there was a South Park episode about it. They don't know WoW, only South Park, but it is in their mind, so they think about it, when they hear "WoW".
Most of my friends who don't play WoW, don't play because it's too cartoony style. They think it's childish. Not because of Pandaren, because of the style per se.
One of my friends laughed his butt off, when he did the quest to cleanse Teldrassil, because he said he felt like "Sailor Moon".
People will always think of a thing they know, when they see something similar. But that doesn't make the point more valid, nor should it prevent anyone from having fun with it.