Terrific discovery, Brendan! Now that we know that many of the words attributed to Bix were lifted from other sources, perhaps the whole interview is cast into doubt. But to the extent that the last section of the article might reflect some of Bix's actual words, my interest hovers about the locution, "movie-shy." A couple of years ago on this list, we kicked the possible meanings around, without resolution. Perhaps it has been explicated since, but, if not, here is a possible ray of light.
The U.S. Copyright Office's Catalogue of Copyright Entries, Part 3, Volume 21 (1927), page 691, has an entry for a musical composition entitled "Movie Shy," words and melody by J. Tally, deposit copy received June 26, 1926, registration number E 644012. The entry also includes the following: "John Tally, Chicago, 13626."
I stumbled across this by doing a search on Google Books for the phrase "movie shy." Alas, what I retrieved was only a small fragment of the Catalogue of Copyright Entries, but enough to encourage some research, perhaps. Maybe the song or its lyrics have some connection with Bix's life or thinking at the time--or maybe this is just another borrowing by a reporter who never met a phrase he didn't like enough to plagiarize.