I second that heartily! I'm afraid I have such cognitive dissonance hearing these sweet voices, little say watching the sweet young faces, that I simply can't suspend disbelief.
The composer stretches the boundaries of what can be done with a capella, and the high quality of the lyrics means that any accompanying instruments might just blur them further (it's hard enough to understand them). But I'd like to hear this done by a bass and a baritone, at a slower speed.