Is that reference to WoWs expansion classed as one of the 2 MMO's that sold more at launch than GW2? If so an expansion to an existing MMO cannot be an MMO in its own right surely?
I paid £40 from Blockbuster store day of release (only 35 online from them gggrrr) best MMO I have played, reached level 31 with my asura thief since proper launch day. Still people go on and moan that GW2 features grinding, ffs any RPG (or any other genre that requires levelling up skills, weapons etc.) requires a "grind" to get money to buy kit to upgrade character etc. what GW2 has done is made it a bit more fun, well in my opinion anyway.
What you need to remember is that there's what people want to hear, there's what people want to believe, there's everything else, THEN there's the truth!