User blog comment:Njalm2/Fanon Canon - Grimmjow's Espada!/@comment-4509522-20150116033246/@comment-3403804-20150116114210

Considering that the Espada were more or less defeated with zero casualties on the part of the Shinigami. At least casualties who mattered, I think they'd have done much better if they didn't deliberately outnumber themselves from the start. For it to make sense that they're ten, they'd have to be much more powerful than the Shinigami, which was never really the case.