all that link shows is even at block 12 (2 hours after launch) satoshi wasn't alone.. yet the guy in the article still gave it a black dot..
Well, so what?
First, unless one created some interesting difficult coordination between multiple machines, then multiple mining machines would likely not form part of the same nonce series. Ergo, if Satoshi had multiple machines mining, they would likely be indistinguishable on this graph from one machine owned by Satoshi and others owned by others.
Second, do you have another explanation for this visible evidence that one nonce series results in a stash of 980,000 BTC?