Please, oh please be joking. Or at least tell us you mixed up the pics or something, because a mage without a robe is hardly a mage at all... Seriously, the only toons that look better without some kind of kilt or skirt (or robe etc etc...) is Hunters, Rogues, Warriors, Pallies, Enhancement Shammies, and DK's - regardless of race.
Honestly, this just goes back into the "traditional" phase of... well... the world. Mage is the "magical" equivalent of the Wizard. How often do you see a wizard NOT walking around without a staff!? When have you seen the greater Wizard Community poking people with daggers and swords? Why, therefore, are we encouraged to use Sword/Dagger+Offhand instead of a staff?
With that in mind... When do you not see a wizard, male OR female, NOT walking around in a robe(m) or dress (fm)???
There's that and (imo) draenei's legs look ugly... lol. Completely epic with kilt or kilt-like attire around the legs. But a draenei in jeans?! *shudder* Even the Humans, Undead, and all other mages. Getting a robe is like a birthright... We hit 80 and feel all weak or what-not. We suddenly get our robe and cover up 'dem legs. Now, through some random act of... something, we suddenly FEEL epic... I mean, if you've ever played a mage, did you suddenly feel any different the day you got out of shorts and put on big boy clothes? Because I sure as hell did.
/end rant