I would think it to be, no offense, common sense to post the reasoning for a semi-major change(any change that warrants informing the public before release) when you post the change itself. I don't mean to be an ass about it, but it just seems begging of speculation when a change is announced without announcing the reason for it at the same time.
Or I suppose he can name whatever he wants whenever without anyone needing to know squat.
I hadn't heard or even care till I read this post.
being in agriculture my whole life I didn't understand how we got biofuel from fermenting/stills anyway.. that is called ethanol. not like i'm going to throw a stink about it though.
Diesel or Fuel as is called in my area.. takes oils from various plants and through a chemical process with lye and methanol creates engine usable fuel previously stated as Diesel.
Far as I'm concerned he changed the name to be correct for what it actually produces.. good enough for me.