i was referring to the fact that Hiyori, and now Ichigo, took the longest to bring their Inner Hollow under control. Like I said, it's not clear yet what to make of that.
Some would say that the stronger the opponent, the more time it takes to defeat them. Others would say that this lack of emotional/mental stability causes them to take longer. I honestly think the two are a package deal. You're unnerved by facing this side of you that is so carnal and crazy, moreso when it's a stronger force, but because you can ultimately overcome this great obstacle, you reap the greatest benefits. just my two cents.