GP5000's were by far the most common narrow tire on the IP, and everyone loves them. Most of the wide-tire crowd were running RH, but one guy with 650b's said he has given up using them on gravel due to repeated sidewall failures and was using some WTB gravel tires that he agreed were overkill for that ride. I was satisfied with my gravelkings which I still think are the okayest tire for randonneuring.