Over thousands of samples by hundreds of participants the higher resolution file was identified something like 49.5% of the time, so basically they were completely guessing.
Thank you for that - I have often wondered if lay people can hear a difference.
Personally, I never was convinced that vinyl sounded better than CDs. NPR had a blog about that and I posted it in another thread one time.
http://www.npr.org/2012/02/10/146697...than-cd-or-not