They mention it in the article and couldn't come to any conclusions.
I don't see anything that stands out as saying these couldn’t have been written by the same person (especially separated by a decade),” he wrote. “Nor do I see any similarity that wouldn’t also be true for many other authors and codebases. At a minimum, however, if they were written by the same person that person’s styles changed a lot (either due to time or intentionally hiding them).
I have. I compared contemporary Truecrypt and Bitcoin sources. They don't show any obvious sign of being written by the same person. If anything I'd say Paul Le Roux is a better programmer than Satoshi.
Well TC is much older than Bitcoin, so you'd think newer stuff by the same author would be better. But it's hard to say anything for certain. The projects are so different in form and function. TC targets Windows, Bitcoin targets Linux. (Yeah, they're cross platform, but if you look at them you'll see what I mean) The cryptography code included in both is public domain/third party so that doesn't help. Bitcoin has networking, TC doesn't. TC is a driver primarily, while Bitcoin is not. They don't use the same GUI toolkit. So a lot of it is really hard to compare because the style of the code is following the common idioms for the framework being targeted. Where the author is more free of convention, they don't feel similar to me.
I should write up a detailed post about this topic.