User blog comment:Soulreaper1234/Being more Than 3D or Being ShinigamiLess Power/@comment-44061-20100917041752/@comment-44061-20100917081753

There is no issue. Aizen hearing Ichigo's words wouldn't be happy. Its clear to him no matter his transformations Ichigo has surpassed him. His supposed "evolution'' has been the driving force for Aizens arrogance for many of the chapters. To find they mean nothing and that after all that Ichigo still has surpassed his perceived greatness is his issue. Ichigo's words specifically speak to the end result of using his technique. He never says when he will lose his power and by Aizen's own words he has surpassed even him and all his transformations. No matter what Aizen does at this point he has no hope of defeating him. Hence his reaction to the form. Aizen is in no position to go blow for blow with somone more powerful then him. Just as Ichgio was in no position when they first battled. The technique would be pointless if it worked the way you insinuate that it does. The power loss will more then likely take place after the situation is finished and he deactivates the technique. It is a sustained technique.