No it's not true. I've self posted a number of times and I've yet to see a post saying "hey, dont self post"; sometimes they flopped, sometimes they did really

No it's not true. I've self posted a number of times and I've yet to see a post saying "hey, dont self post"; sometimes they flopped, sometimes they did really well. No one complained :) Indeed the guidelines actually encourages some types of self posting: if you want to add initial commentary on the link, write a blog post about it and submit that instead. (and indeed this very submission seems to meet those guidelines exactly :D)