That was what they said when CD's first came out. Along with much more scratchproof than records! I dont really hear it on my classical CDs.
I 've got Stravinsky on CD and on LP. (not the same conductor/symphony unfortunately) The quiet passages of "Le Sacre du Printemps" are almost indecipherable. (this is through an Adcom 535 and JBL control 10's) Now of course I think the mastering engineer should've cheated and shortened up the scale on that a bit. Maybe a 2:1 or 1.5:1 compressor? On an LP you do have compression, both as part of the transfer function, and as needed to make sure the needle stays in the groove. So the LP will sound like it retains more body to the music in the softer movements.
The classical CDs I only listen to the parts that sound good, the loud parts, this is not me being a snob. I just couldnt tolerate it after a while. I guess I have trained my ears to hear into stuff more than your average joe. hundreds of hours at a DAW will make you sensitive to the subtle difference between 88.2k and 44.1k. 16 and 24 bits.
To me, the LP sounds like 24 bits, but with some intermittent noises.
As far as double blind tests, at my studio, or with my AKG240s on, no problem. Asking people to identify the format of mixed program material in an unfamiliar acoustic environment is silly. Much less at an AES con! I used to try out mics and pres on the floor, but you really cant make an informed decision unless your day job is recording crowd reactions for a game show.