Not sure about the delay time; will check that out. I have heard print through on only a couple of my other records, for example on the Elvis' Golden Records Vol. 3 (which is a very good record btw) but I assumed that this was due to the old tapes.
Have you heard the Trinity Revisited album? The first cut is completely A cappella, only Margo singing 'Mining for Gold.' It's live of course and in the Trinity church with plenty of reverb and acoustic space.
I'd be curious to know if others have heard this on their rigs. I'm not sure how it was recorded in the Trinity Church; will look into that.