Yes, really. There voting system allowed 1 user to vote multiple times.
Plus considering that other MMOs and even other Games didn’t advertise nor ask their fans to vote for them. Legit only Blizzard brought this poll to the attention of it’s population via this Thread and since there was only a max of 2 million votes (essentially as much people still playing WoW)
Its quite clear that the only reason why WoW won was due to them bringing this poll for “Favorite x” thing meanwhile their competition, like FFXIV and such didn’t even bother to bring this to the attention of their playerbase. If they did then there would of been alot more votes.