You obviously haven't known Blizzard well enough then. Blizzard has done well enough white lies to keep the public happy.
But if you want proof of it, look at the Original Poster's... post. In Blizzcon they "did" state everyone with Annual Pass will get in right away. Then when it came around to releasing the beta, they pretty much went "Oh F*ck, we said this at Blizzcon, hope the subscribers aren't mad."
They also stated People with Much longer account Activity, aka been Playing since Vanilla, would get their invite before people who are more new to the game. Also again, I've known and seen people who played this game for about a year, or less, and got a beta invite.