User blog comment:Zwann/Vasto Lordes in the Espada, let's analyze./@comment-1590714-20091018075820

Toshiro ALSO SAID that Vasto Lordes were STRONGER THEN AN AVERAGE CAPTAIN! And since Hollows (and presumably Vasto Lordes, too) can also evolve into Arrancar, they can gain a massive increase in power. I just don't see how they could've been Vasto Lordes, because (in my eyes) the just weren't strong enough.