All software would have supported it, and it even would have been possible to manually force GPG into creating a key with those preferences in 2008.

But we already have a key for Satoshi. Everyone knows that it's accurate. It was created on Oct. 30, 2008, and it used the default GPG cipher preferences at the time.

Now we're asked to believe that Satoshi had a secret additional key also created on Oct 30, 2008, but it used the default cipher preferences of today's version of GPG. Why would Satoshi create two keys on the same day with different cipher preferences (one of which is conveniently the default for modern GPG versions), and keep one totally secret? It's theoretically possible, but it makes no sense. By far the most likely explanation is that it was back-dated (easily possible with stock GPG) in order to trick gullible people into believing that this person is Satoshi. The other "evidence" is similarly worthless: Satoshi never used satoshin@vistomail.com (only satoshi@vistomail.com and satoshin@gmx.com), and the blogs were obviously back-dated as well.

I am very disappointed in the community for (largely) being fooled by this obvious imposter.