User blog comment:Salubri/Ichigo vs. Aizen: About Time/@comment-1747976-20100320133807

I HAVE A THEORY. It is quite possible that Aizen's merging with the Hogyouko has left him with new abilities. If you are wondering about how he knew all about Ichigo from his inception as a shinigami, then I say that after he examine his reiatsu, he was able with the help of the Hogyouko to read his 'history' in it. When he said, "Is this your reiatsu? Amazing...." Knowing him, he probably was also referring to the ability to even examine it in the 'palm of his hand' and thereby try to further manipulate Ichi and goad him into what is probably the next stage of a plan that has had, as we have seen, ups and downs an a few surprises to boot. Anyway, this my answer to why he was able to tell Ichigo those statements with such serenity and certainty. Then there is also the speculation about who he actually is in reality. Meaning Aizen. That is another blog.