Yes. In my research, RRCA certification seems mostly a matter of wasting money at a hotel in a far off city and then forking over a couple hundred dollars to the RRCA. USATF certification seems much more comprehensive in requiring knowledge of how to coach.
As with you, I'm not saying there are not good RRCA and USATF certified coaches out there. Heck, depending on where things go for me, I'm not even ruling out the possibility of getting one or both certifications myself if I think they would be of some kind of benefit. However, personally, I'd put much more credence in the words of someone with a wealth of experience in the sport, whether or not they have certifications, over the words of someone who has little other than certifications to show.