Harvey, I'm a guy under 30 and I must say that I absolutly love Simon and Garfunkel, there duo stuff as well both of their solo stuff. One thing I don't think those younger critics understand is the art of performance. They are both exceptional performers, even without the dancers and theaterics. A good example would be there Concert in Central Park album. In my oppinion, that's the best version of Bridge Over Troubled Water. Even with a great voice like Art has, you can't think that it would be easy to get up in front of 50 thousand people in Central Park of all places and deliver the song like that.
The same thing happens with Sports critics. To this day I come a cross criticisms of how John MacEnroe was too much of a weiner written by a guy who has never played the sport and looks like he hasn't made it off his couch in a decade or so. He clearly doesn't understand the competition MacEnroe faced, or what that might bring out of you. It's the same thing here. I don't think it's that these critics are young, but they probably don't spend much time in front of an audience (especially of that size) and they just don't understand what's going on.