What *might* make it trickier for older-minded (not _older_
   because there are plenty of young people who share the
   older-minded thinking) - it's not an age issue per say...

   ... is goals that are complimentary yet might be extreme to
   those who are still babies to the concept.
   [1]http://www.tlc.com/tv-shows/i-am-jazz/ - Jazz, who is a
   wonderful girl with an amazing family who is lucky to be able to
   get puberty-stopping hormones and all the marvels that modernity
   can bring to help her out, until she eventually becomes old
   enough to design on gender resassignment surgery.

   However, this can also prove to be confusing to people who have
   a standard binary notion of gender when it comes to their kids
   or grandkids or nieces and nephews.

   "Boy play with dolls. Will he be transgender?"

   So it raises the stakes for those who would have had enough of a
   problem with the "straight/gay" issue.

   In the end, it's a "good thing" I think, but I feel kinda bad
   for those who still adhere to the old boy/girl
   roleplaying=fact... when... _most_ differences are culturally
   assigned... with a few key features (and perhaps a _few_
   estrogen or testosterone fueled cognitive differences but not
   many).

References

   Visible links
   1. http://www.tlc.com/tv-shows/i-am-jazz/