The longest I've waited was a little over a month for a capsicum galapagoense seed. It ended up dying on me after it germinated . I don't wait longer than 2 weeks for superhots. I would if I only had one seed of a variety left though.
Wow that is long. The dedication to keep watching them must have been intense. Not forgetting about keep them moist and even just remembering that they are still there while all your other plants were all producing.