Well, this is based on my experience as GA author and reviewer. I have never seen an IP successfully nominate an article (I did see nominations once or twice, they failed quickly, as the articles were not up to GA level and IP never came back). And of course, I have yet to see an IP GA reviewer (that is not a troll or a useless if good faithed newbie). If you are aware of any successful GANs were the primary author was an IP, I'd like to look at them. I'd hypothesize that: