The Tank Shortage
Let's take 3 Guilds and see how the players in that guild would perceive the reality of the tank shortage.
Guild A is in Tier 4 content. Their Main Tank just took a month long vacation from the game. They are a small guild and really didn't have anyone ready to fill in the gaps. Perhaps they had capable players, but the toons were a bit undergeared or lacked experience. This Guild sees and believes in a severe tank shortage and hopes Blizzard does something quickly to get more people to roll tanks.
Guild B is in Tier 5 content. They have several players with experienced and geared tanks. One of their tanks just got ninja'ed by a Tier 6 guild. They may be a week or two bump where they get a tank up to speed on fights he hasn't tanked, but for the most part, they keep right on chugging. This Guild doesn't see a severe tank shortage, but a more mild one. While action on Blizzard's part to get more people to roll tanks would be welcome, they probably don't see a pressing need.
Guild C is in Tier 6 content. They have more tanks than they can possibly ever use. They have tanks sitting at the stone waiting to sub in. One of their tanks leaves the game to go place Hello Kitty Adventure World. They miss their old raiding comrade, but their raids hardly miss a beat. This Guild doesn't see a tank shortage, in fact, they probably feel like there are too many tanks.
My belief? Good tanks slowly migrate to the more progressed guilds leaving a gap in the lesser progressed guilds, and for 5 mans/Heroics. Warriors are the most played class in WoW, having surpassed Hunters. Yes, some are PVP devoted, but not all. Druids are plentiful (though most are Resto), and you can't walk 5 feet in Shattrah without tripping over a Protection Paladin. Boy has that has changed over the last 6 months or so.
Since Blizzard wants to answer this 'pressing' need for tanks, they have introduced a new tank class into the expansion.
Blizzard continues to believe the player base is just dying for more World PVP. I don't think that's the case. Sure, you'll read about it often on the forum boards, but every time a World PVP objective is actually added to the game, it tends to be under utilized. The things that I think players truly want like seiging Capital Cities, Blizzard has already said no to multiple times. Now, in the expansion, they have put an entire zone dedicated to World PVP. I tend to believe the zone will not see a whole lot of action.
What do you think are some other Urban Myths in WoW?