I think its happening on both sides. What shows that is the fact you say it. That you feel the NEED TO SAY IT!
This is a good chance for us all to be aware of our projections. We all project this:

"They must think :"but perhaps from your teenage perspective, you can't see that? "

This means that you DO think that because of her age she cannot see something that you do see! So by saying this you just prove her words right. Not referring to them at all and not getting angry at all would be a way to convince her OTHERWISE - BUT - of course;

It is totally ok to get angry. It is totally ok to refer. I think that what happened here now is that this triggers these ego hurting points...

Teenagers feel that adults don`t respect them and adults feel that teenagers don`t respect them. The question is:

• Is that true?
  Or is this something from our past that turned into a default reaction?
  Or is it not true at all and one side imagines it....

I know i am responding to it because i feel this way too - but i am not responding JUST out of anger - to say that someone here not ok - i think that these conversations are a wonderful opportunity to expand the awareness of all sided included!