Given that some will be lucky and others not so lucky I suppose I fall into the same category as you, Julie. I don't get that much anymore. But early on yes, there were tons of yes buts and they were almost invariably around the two items you mentioned.
Sometimes the best way to explain is simply to wait on folks to come to you. That way when the first yes, but arises, just say "O, so sorry, i thought you wanted to know about how I felt. I suppose if you really wanna know how she, him or they felt you should ask them."
Kinda harsh in a way, but effective and does manage to silence the yes buts I found. As for people wrapping their minds around transition. Give them info when they ask, but don't try to get them to understand. Some will and others will remain shaking their heads.
Strangely the most difficult thing I found was overcoming the idea that "O, so you were gay and just wanted to be that way and the hormones allowed you to be attrcated to guys?" Seems the Blanchard idea of homosexual transitioners is rather a popular one among the populace.
Nichole