Haha this is a question that has always been in my head. No matter what, most legendary drummers seem to have been drumming from birth. All great players learned to drum at age 3 and then start gigging before they become teenagers, thats just unbelievable! I started drumming at my 15th birthday, and now i'm 16 and i feel, looking at all these amazing musicians, that i cannot achieve such status just because of their early beginnings.
Now i doubt i will ever reach such levels as Dennis Chambers and the like, but i still wish i had gotten into drumming and music at such an early age, as the best have. In the end, i think the advantage the best drummers got was not only more time to learn, but also being immersed in the instrument and learning with everyone around them and making the drums all that is important to them.
I always hate when i see some child prodigy play better drums than i can...