There is way too little context in most of the comments in pending comments for me to decide if they should be endorsed, I really can't imagine scrolling through that page and then clicking 'parent', etc to figure out the context; particularly during rush hours when I'm already worried any click I make on this site might result in seeing the "HN Status" twitter history page.
My karma is >10k, so maybe the system still puts my posts into a pending state but then auto-endorses them? Not sure, but pg did say in another post that users with karma >10k were exempt.