Although not only die-hard-fans should be allowed to write concert reviews. I think if some neutral person writes about a concert, it might even get more worthy and valuable than the usual "fan-boy" talk. I for my part can understand some of the points he made indeed - from a neutral point of view.
LE
100 % agree with LE
It's very interesting to have some "objective" point of view.
When I listen to Marks' music, I often say "voowwww !!!"
and if I made it listen to a friend of mine, a colleague, someone of my family, my wife (....) , he/they/she says : "and ? what's the deal ? when will the song really start..." you know this kind of things...