I think this is probably true. I've heard negative opinions about most, if not all, of the Leica 'specialists' who are regularly discussed here. The IIIc I bought from the classifieds here had allegedly been recently CLA'd by one of the top US based Leica repairers before I bought it but was in a dire state when I got my hands on it. I suspect that the secret is to find a repairer and establish a relationship with them and take it from there. And use the camera reasonably regularly.