Talking with a friend of mine a couple of days ago. He was the guitarist and band leader in the band Neil was in here in Niagara before Rush. My pal told me that Neil had the same drum solo with his group as we hear on Rush's live album "All the World's A Stage" so...yeah, he was developing that one for a bit. Anyway, he said that Neil was phenomenal even at age 16.
Check out this earliest known recording from Niagara group J.R.Flood.