Yea, the 2 decade generational period seems a bit long considering the increased speed of development of the technological infrastructure cycle which results in vastly different experiences. A 35 year-old grew up with dial-up internet emerging, while a 16 year-old grew up and everyone had cellphones.
Seems like a strange unit when you have a range from 16 to 35, I don't have a lot in common with the average 18 year old any more.