This was published about three weeks ago in the Guardian and at my last time of reading there had been in excess of 1,600 posts to the article, all offering additions to the top fifty at which he had arrived. A general consensus was that even a top 100 would still induce posters demanding why a particular song had not been included.
Personally I was perplexed as to why "Lilly, Rosemary and the Jack of Hearts" didn't find a place; although in Petridis' defence he did state that any track from "Blood on the Tracks" could be included in the top 50.