I have found that people, by and large, are only open to knowing the truth about themselves when they are ready for it. Pointing out to them, what may or may not be an accurate truth, before they are ready, will not get you a thank you.
So, no. I no longer come out and tell anyone, even people very close to me, anything like, "I think you may have such and such". It doesn't work. People are resistant by nature. What I do in some cases, is lead them down a path of information. If they relate, then great. If not, then well, it's their life.