Many people have, if I remember correctly. The most recent one is at https://blog.lopp.net/hal-finney-was-not-satoshi-nakamoto/

Thanks for the informative read. It doesn't do a stylometric comparison, but the rest of the evidence is fairly compelling.

I didn't much buy the coding style comparison, as I myself often switch around the styles being compared in the article.

One of the reasons why I doubt Satoshi is Hal is apparent from these forum posts: if my goal was to stay anonymous, I would not immediately associate my real identity with my anonymous one. Hal is one of the first people to reply to this Bitcoin forum post.