but that doesn't make me based in Britain.
You said it before me. I do use expressions like "bloody hell", but I'm far from British.
up to the point that he tries to post around the clock to hide his time zone. Does his writing style really say anything useful about his whereabouts? I doubt it. Same for Satoshi.
Not at all. People can easily have strange sleeping schedule if they work on big projects they like, off work. Or people who travel a lot.
I could maybe say, based on such a schedule, that he probably doesn't have small kids at school

but not much more.