chaitany......It is not my observation nor experience that there is a "gap" between teens & their parents. Certainly not any gap beyond the normal distance that teens and adults have, based upon age, experience and that which human nature dictates.
If anything, in the young families today, I see a better bond and a more mature & more relaxed connection between parent and teen. This generation of parents are more educated (I should explain that I'm a Boomer), more tolerant and much more "in-tuned" to the youth. I believe because both parents work as well as share child rearing equally (not so in MY child rearing years)....this allows both parents to have unique relationships with their kids. Teens are far more OPEN with their parents and that can be only beneficial to communication.
I'll admit that my opinion is based on Now vs. Then.....but the "mental & emotional" gap was HUGE between parent and teen in my generation. We were raised to be "seen and not heard"....compliant, obedient under any & all circumstances and there simply were "things you did not discuss with your parents OR in their presence." No, it's not just my experience......talk to any boomer.
I had a much closer, more realistic relationship with my sons than my parents had with my sister and I.....and I see that my sons have an even better connection with their kids....
So...anyway...hope you can accept my comment and not be upset that I disagree with the premise of your question. It's what I see & feel.