Yes, that makes sense. However, unless there's a significant corpus of an author in the training data it won't recognize them. One of the author's that I fed into Claude was a passage from the book Leepike Ridge by ND Wilson. Wilson has written online and in print quite a bit, but Claude couldn't guess the author and guessed that it was a passage from a noir crime novel.

Wilson is a fairly idiosyncratic writer with a distinct style, yet even still Claude couldn't guess correctly from a currently published book.

I suspect that what's going on here (like other's are suggesting in this thread) is that Claude is in some way biased towards certain sets of authors by its training.