Double space after punctuation is same though. It's rare to see someone to hit double space after it and it's there on both satoshi's posts and that letter.
I'm Satoshi too then.

Mr. Satoshi, you know where you can send your coins, I'll take care of them

I was taught to double space after periods... probably quite common
I wouldn't say it's pretty common. Is there even anyone at this forum (except satoshi) who do it?
If it is him I feel bad he got outed. Journalist are indeed the nut low of the world