On the UCT Blogspot, comments of that order are unthinkable. Most posts draw none - the most (non-spam) comments on a post is 31. Hit might be a better indicator of 'success' - but the "most read" list contains only current posts, and so finding figures for "all-time most read post" becomes rather more tricky. It may be possible to distill something from the stats page with sufficient patience, but I suspect Celia's Al-Jazeera post, which amassed more than 800 hits while still current, would be the leader.
Is popularity - measured either by comment, or by hits - a valid indicator of "success"?