It's not a very well-designed experiment. Aside from changing hormone levels, there's a slew of other variables: Relief at having achieved their transition, aging and maturation, actual memory of past feelings and experiences, and so on. Further, simply using one's self-reported perceptions doesn't provide a very secure footing for a serious result. Sure, use it to drive curiosity and do further experiments. But don't believe your deriving too much "truth" at this point.