I'm not chipping into to defend MLE, but he has a very valid point. A lot of emphasis gets placed on how good or how bad something is, but the scale is a large scale. If someone makes a purchase, and it's a good one for them, the abilities of the product can get a bit embellished due to the initial excitement of the purchaser. I think all MLE is striving for is to level-set expectations. The more honest we are, the better off all of us will be. By honesty, I'm implying our own honest view of something base upon what we've read. If we read good things, our mind tends to multiply the information by a large factor. Up until receiving the item, our expectations are set pretty high. If, what we receive is actually lesser than we had built it up to be, we end up getting disappointed.
I don't disagree with what he says, just how he says it and the frequency of him saying it. :)