@solesamurai: I doubt it... the only explanation is his Zanpakuto's powers.
Gin's Bankai was made to kill Aizen without the Hougyoku and would destroy Ulquiorra's vital organs, which he has stated that he cannot regenerate.
Also Gin would be cutting Ulquiorra in pieces pretty quickly.
Thats pretty much what I did last week lol.
lol... I also had to mow the lawn... and my yard is enormous lol
Yard work huh, that was me 2 weeks ago LMAO!
Oh the irony....