Reuter's Felix Salmon reasonably opines on the likelihood that Satoshi Nakamoto is Bitcoin's Dorian Nakamoto:
One way to look at this problem is to try to calculate probabilities, and do some kind of Bayesian analysis of the question, given that either Dorian is Satoshi, or he isn’t. (To make matters even more complicated, Dorian’s given name is, actually, Satoshi. But you know what I mean.) But here’s the problem: if you believe either of the two possibilities, you have to believe in a reasonably long series of improbable propositions. Call it the Satoshi Paradox: the probability that Dorian is Satoshi would seem to be very small, and the the probability that Dorian is not Satoshi would seem to be just as small — and yet, somehow, when you add the two probabilities together, the total needs to come to something close to 100%.
Salmon's comparison of Dorian vs. Satoshi's English style and fluency alone makes it well worth the extensive read.