Yes but there will be differences that may matter a lot. I suspect that a lot of members of my cohort (I'm 36) still have no idea why we would want to tweet. I spent a lot of time on IRC when I was younger (not any longer) and I suspect that both being young as well as birth year play a part in some of these behavior patterns. This behavior and interests would also be affected by other factors that may correalate with age (such as having a spouse and children).