When I started training my 4½ year old dog as a puppie I knew of no-one that used clickertraining. It was either "traditional" correction based or lure-reward with treats and praise. (I used lure-reward)
My second dog is now 11 months old and just passed the DRK-obediencetest. There was 20 or 25 dogs present. I saw 3 owners wearing clickers and one other told me that she had clickertrained her dog. Meaning that at least 5 of us present that day used clickertraining. And I live in a part of my country where things traditionally take a little longer to implement....
Furthermore since I started clicking my older dog she has surged ahead in the conformation ring, going from getting 2nd 's (=FCI "good") to 1st w/CK (FCI= excellent) and she is now one CERT from becoming a national conformation champion!
Apart from that - and more importantly - she obviously enjoy being in the ring. I have gotten lots of comments on how well she shows - and I am getting asked how to clickertrain a dog for the ring by people with several years more experience with conformation shows than me (over here we have no professional handlers, the owner or sometimes a friend will handle the dog in the ring).
What seem to impress people the most is how responsive she is to me. I can make her move a little or shift her weight, just by shifting my own weight - this is something that more or less trained it self - I just rewarded her for following my movements, and gradually made my movements less obvious. It's like we have an invisible line between us, if I move a step, she follows with a step, if I just move my weight she will just move her weight. It is much easier than it sounds - try it, I is a fun exercise!
I have started buying clickers in bulk and having a few extra in my pocket so I can give clickers away to people showing an interest (along with a short introduction speech, and a page with references to good books/websites) - it is like the pusher's technique: give them one for free, get them hooked... LoL...

