User blog comment:GinIchimaru/Bleach 400- WTF/@comment-1719668-20100416003636

It may be time for us to actually discuss the damage that Aizen took due to the 'Itto Kasou' (assuming I am spelling it right). Clearly, it was more than just superficial, and nothing less would be expected from Yamamoto. Now, Ichigo is definitely not supermanlike, and if you put in his relative inexperience, I am not surprised that Aizen was able to fend him off with superior technique. But it was inevitable that he could fight at that level with a captain-level(or more?) shinigami who is clearly highly experienced, and God knows how powerful.