I'm 18 and have been not-so-dedicated to paleo for about a year. I always take a person's age into consideration when reading any advice on dietary health online, since I obsessively read every question on PaleoHacks. Adjusting to a paleo lifestyle has been anything but easy, but I never give up. Changing my diet made my last year of high school fantastic and I wish other teenagers would give Paleo a shot.
Edit: My mom actually got me involved in this diet. She studied Nutrition and Fitness in college and never understood why all of the nutritionists were either severely underweight or morbidly overweight. My only wish is that I would have become aware of this sooner! I think this diet would be beneficial for a person of any age.