Board Thread:Questions and Answers/@comment-25148221-20140707021425/@comment-5398287-20140707191157

I'm going to hope/assume that you're referring to the part of the story where Aizen claims to have shaped Ichigo's path from the start of his career as a Shinigami, as Ichigo has never had anything to do with shaping Aizen's path and he has never claimed to have done so. First, let's post Aizen's half of the conversation, as the only important part Ichigo plays in that chapter is pointing out how incredibly hard to believe this monologue is:

Aizen wrote: Surely there is nothing to be so surprised about? All that I am saying is that I always believed that you would be the perfect subject for my research, and as such, I worked to hasten your development. That is all that I mean. Did you never think it strange? That despite never having witnessed a Hollow before in your life, you happened to be attacked by one immediately after encountering Kuchiki Rukia? That an ordinary piece of bait that Quincy use to aid in the efficient elimination of weak Hollows would attract a Menos Grande? That just as you had begun to become used to fighting as a Shinigami, Kuchiki Rukia, whose Reiatsu had not been so much as detected up until that point, would happen to be discovered and reported to Soul Society? That Abarai Renji, Zaraki Kenpachi, and Kuchiki Byakuya would each become your opponent at precisely the point when your strength began to rival their own? Did you never once think any of it strange? Perhaps you believed that your meetings were "fated"? That those attacks were mere "coincidence"? Did you believe that your victories were the result of your own efforts? Please, do not disappoint me. Your power at this stage should be so much greater than this. Do you find my words difficult to believe? Nevertheless, these are the facts. An interesting argument. Think back upon what you have just said. You call me a liar. You claim not to believe my words. Why, then, do you choose to believe that what I have just told you is a lie when the lie could just as easily be what I stated back then? I suppose it is only to be expected. You have my pity. There is no such thing as "truth" or "lies" in this world; there never has been. There is only plain, hard facts. And yet, all beings who exist in this world take only those "facts" that are convenient to them, and take them to be the "truth". They do so because they know no other way to live. However, For those powerless beings that make up the majority of this world, it is those "facts" that are inconvenient for their own self-affirmation that make up the real "truth". Do you suppose to be aware of all that is "fact"? Who was responsible for assigning Kuchiki Rukia her position in the human world? Who modified Abarai Renji's equipment to include the capacity for Reiatsu detection? Who distributed to the Lieutenants the relevant information pertaining to your movements? Was I truly unable to uncover the location of the Hougyoku for over one hundred years after its completion? From the beginning. Do you not understand? I was under that assumption from the very beginning. I have been aware of your existence since the very moment of your birth.

Now, onto the question of this thread. There is nothing even remotely hinting at this being Aizen's "true power", or even the power of his Bankai. This is either Aizen falsely taking credit for certain events in the manga in order to really, really screw with Ichigo's head; or him just straight-up lying for funsies. The two of them aren't exactly mutually exclusive, either.

tl;dr no.