I think it's safe to say that only a small portion of players post on forums and even less follow news on changes about the game and the upcoming expansion.
Yesterday, I asked what people thought about the upcoming ability "nerf", not being able to fly in Warlords and about no Tier/Bis trinkets in the Raidfinder in a very large social/leveling guild and people got angry and upset at me for telling such lies. They just would'nt believe it, perhaps even refused to believe it.
This made me wonder what kind of shockwave will go through the playerbase when they only discover these things when they go live. Especially since the changes are pretty huge compared to last expansions that already got people upset about minor changes.
This could potentially be a very, very bumpy start for Warlords.