After examining the liner notes and finding no mention of the DeLeos, I question whether or not this was, in fact, ever an STP song.
I know that when we first received the 5 "Unreleased Outtakes" it was labeled as an outtake from the No. 4 sessions -- but other than that, do we have any actual proof?
This one NEVER sounded like STP to me - the experimental nature of the music (that whole Beatles-y part with the horns...) - that always tasted a little more like Weiland solo to me.
Is it possible that whoever is responsible for "leaking" the Outtakes may have mislabeled "Learning to Drive" as STP rather than Weiland solo?
Since he's been working on HIG for around 10 years or so, it could have very well been written as a SOLO song during the time the band was writing material for No.4/SLDD.
It's been a long time, and I really don't know the details of the Unreleased Tracks (like how much information was given with them - lyrics credits/music credits, etc.). Just my $.02, though.