Strong words coming from a man who is currently parading around British TV flogging cheap car insurance alongside an incredibly creepy puppet likeness of himself.
What is he saying? This reads like the ramblings of a mad man, of a recording of a therapy session in a mental institution. There is nothing to attack or praise because it's empty rhetoric, although in the mind of the author undoubtedly profound and insightful. I don't know the website this is on, but I don't see why this is a 'letter of note' - at best it's a 'letter by someone somewhat famous'. That's one way to fill a website I guess.
Although I can understand your not enjoying this particular letter or agreeing with its inclusion on a blog named Letters of Note, to hear you then use that as a stick with which to beat my entire website - a website you admittedly know nothing about - does smart a little. I'd suggest maybe having a poke around; you may come to the conclusion that today's letter simply wasn't to your liking and that, actually, the website does have some value.
To be able to make an accurate assessment of your website, and proclaim my expertise on it as such, I should look around more than base my conclusion on one post, that much is true. That said when one makes decisions, it's usually based on incomplete information; and the lower the stakes, the faster the decision. When reading this letter I only had the one in front of me to decide if I was going to read any of the others, to see if those were better, and considering the very low value of the one I saw I didn't see it as good use of my time (or more accurate, the most suitable thing to waste my time on...) to browse other letters.
I guess the snide remark didn't contribute anything to the point of my original post, and that that post would've been off just as well without it. Well such is the nature of a forum - I would like it too if I had hours and hours to hoohah over each sentence I write and get to compile them into nice internally consistent and rhetorically perfect masterpieces. Alas I'm just a programmer posting in between compilation and simulation runs, so the style is much more conversational, and conclusions are often more haphazard than any that would stand up to rigorous scientific standards.