I have thought about that regarding inner groove distortion. Especially when it is common to leave a best song for last. Not always but it is common so that thought is probably the main reason. I don't always hear IGD but sometimes it is evident. Not sure how or why that could be. You'd think the physics of it would make it a constant. Just sayin"
And yes, Alan Parsons being an AE, is very particular and it shows. This new album of his "Time Machine" is really very good. Probably not new at all but new to me. I hadn't bought a new AP album in many years. Glad I picked this one up. New/sealed around $30, money well spent.