Well, I think we can all agree that "Alexis" just doesn't quite get it. Just trying to compare Jimi Hendrix to pretty much any of his contemporaries is wrong and to claim that Cream was somehow less influential just because The Experience breathed the same air...absurd.
One thing I may agree with the author on is the apparent "ageing" of concert audiences. You're more likely to see it happening at shows for more established acts and primarily at those shows where ticket prices are very high. Look at the audiences for certain other groups and you'll see kids that don't even look old enough to drive. Face it....how many teenagers are going to scrape together the cash to drop it all on seeing The Moody Blues, YES or the Allman Brothers? Parents are taking their kids to see acts they themselves saw in the 60's and 70's. See it all the time.
I got tickets at the Tower to see Robert Plant at the end of June. Reportedly, he is going to do a lot of classic Zep. Classic rock is pretty big around this area (Philly) and my 14-year-old son can't get enough of Led Zeppelin so it will be interesting to see what kind of audience mix shows up at the Tower Theater. I have a feeling it will be a lot of Dads with their teenage sons (like me and mine).