I found this article about as compelling as all the other attempts at identifying him. Half of the cypherpunks (I was pretty active) had the same set of interests in public key cryptography, libertarianism, anonymity, criticism of copyright, and predecessor systems like Chaum's ecash; we talked about those in virtually every meeting. The most compelling evidence is Adam Back's body language, as subjectively observed…
The body language thing really bothers me. Personally, if someone accuses me of lying, but I am actually telling the truth, I immediately start acting like a liar. It's really embarrassing and hard to explain. I can't believe such a seasoned reporter is leaning so hard on "his face went red."
In reality, they measure a bunch of things that may indicate lying, but they are just as likely to indicate that a person is nervous or reacting to the fact they're being tested at all.
They're typically inadmissible in court these days, however, there is still a pretty solid amount of blind trust in their results.
That part of the article gives a similar "lie detecting" hypothesis, just without the machine.