User blog comment:Portgas D.Eros/Vice Admirals vs Warloards/@comment-3103150-20101011144848/@comment-1595565-20101011233150

The giants all appear to be vice admirals, as all the Marine giants who have appeared have been vice admirals: Saul, John Giant, Lacroix, and Ronse. It's pretty safe to say that the one Luffy beat was a vice admiral. Also, size doesn't necessarily equal strength. Luffy took out a giant but Momonga and the dalmatian guy were able to take him out pretty easily. A giant knowing any form of rokushiki would be disastrous if you think about it.