It's also pretty important to note that the High Elves barely lifted a finger to help out the Alliance during the second war, despite their oath to always come to the aid of Arathi when they were in trouble. They only helped (briefly) after Quel'thalas came under direct attack. http://bit.ly/g0SrBS

This is a substantially debatable point, and a matter of fairly significant individual preference. The decision that Quel'Thalas would withdraw from the Alliance and into seclusion was a political one made my the King and the Convocation of Silvermoon: even the crown prince, Kael'thas, was not fully on board with it, as he was a ranking member of the Kirin Tor
http://bit.ly/dEl5Z2

Not really. When Kael'thas went to Outland, he took the strongest of the survivors of the Scourge attack with him. What was left behind were the weaker civilians who weren't really strong enough for Kael'thas' army. Now it's been several years since that point, and yes, we have blood elf warriors now -- but originally there was nothing to suggest the blood elves were as strong as the rest of the Horde, comparatively speaking.
http://bit.ly/fndCSY

She was making a point. The horde are actually much much bigger than bodybuilders and the blood elves may be as big as humans but the humans are small in comparison to Draenei and night elves. So relatively speaking the analogy was fairly accurate.
http://bit.ly/eoGAW0