Board Thread:General Discussion/@comment-24815992-20140531203303/@comment-5553481-20140606150310

Considering that Tatsuki was actually able to sense "something" from Aizen but not from Ichigo, could mean that Ichigo's reiatsu was simply off the radar... Theoretical example: Normal person is able to sense 0-100 power, Aizen was 105, he was able to sense 0-210, while Ichigo was 250.

On a side note, Ichigo did not "gain" power with the Royal Guard, he gained an actual zanpakuto/asauchi, while "quincy" Zangetsu stopped supressing his real potential/power; Which resulted in gaining control over his reiatsu, because "quincy" Zangetsu stopped supressing "shinigami/hollow" Zangetsu.

In all honesty, I don't believe looking at his coat is a good way to measure his power, considering it can be destroyed with a cero or something...