Yeah, I guess it could be true, I don't know my Australian arenas. I do believe they want to do stadiums vs arenas simply because of the high cost to tour Australia, and amount of time it would take to play arenas to fully satisfy demand. I remember originally the Vertigo Tour was going to go to Japan and Australia in late 2005. It was going to look like this;
November
18,19, 22, 23: Tokyo - Budokan or Yokohama
December:
2, 3: Brisbane - Entertainment Center
6, 7, 9,10: Melbourne - Rod Laver
13,14,17,18: Sydney - Superdome
Obviously, they realized demand would not be satisfied by this, and chose to go the stadium route instead. Popmart in Australia flopped just as badly as it did in the US, and they were convinced they'd have to do arenas. The effects of ATYCLB and HTDAAB "elevated" U2's stature around the world. If U2 did the I&E Tour in Australia, they could conceivably do 20+ shows just in Australia and NZ, and STILL play for less people and make less money than they could by playing half as many shows in stadiums. I'm not saying it's right, just showing what they're all probably thinking. It's been 7 years since they came to Australia, demand will be there.