User blog comment:Xilinoc/Ch. 665 - The Princess Dissection/@comment-5303512-20160310225005/@comment-5551986-20160312013445

I still think Bluts around. Just not named constantly it gets tiring. Its like Arrancar referring to the hierro after every hit.

Its a semi-passive thing they possess I think, but it needs to be confirmed. Quilge said that for a quincy to deal significant damage to a bankai wielding shinigami they need blut arterie, and to defend against one they need blut vene.

Maybe in every instance when they've performed such superhuman feats they've been using it, they are just quincy after all.