Ours are all AKC, and several are also UKC for participation in UKC events.
When people say "CKC" I think it would make sense to specify Canadian or Continental. Canadian is of course the main registry in Canada, and a reputable registry. Continental is not a reputable registry, being popular amongst puppy mill corporations and other questionable sources. Typically ones who don't qualify for registry with repuatable ones like AKC.
AKC and CKC (Canadian Kennel Club). Gryffon is registered with both.
I only voted AKC in the poll. I'm assuming that the CKC choice you listed is for the continental kennel club. I think that due to the confusion between the Continental and the Canadian kennel clubs, your poll results will be skewed.
Our dogs all have their AKC papers. Ike is also registered with UScA in their breed registry program. I don't see a box there for the SV...I would assume some people have dogs imported with foreign registries.
Well my dog is registered through CKC cont. not can. CKC cont. is becoming very popular where I am almost as much as AKC. I know AKC is top of the line but I have also heard they can be very difficult to work with if you are in the breeding line. My mom has a Shepherd that is ACA I have not even heard of ACA before.