This is very interesting in the light of "Satoshi owns 1 million coins" myth that is being brought up so often . It seems like Satoshi was against concentration of big amounts of coins in one hands, so this might mean 2 things:
1. Satoshi didn't mine any disproportionate amounts of coins, there were many early miners that we don't know about.
2. Satoshi did mine big amounts of early coins, but he destroyed them or don't plan to spend them in any way.
At the very least he must have several hundred thousand. 7200 coins a day were arriving and the only one who expressed any interest in the earliest of phases was Hal Finney and he admitted to giving up mining pretty rapidly. For days on end it probably would've been Satoshi only.