When I was at a pet store last night, they were training dogs to take treats, in particular, NOT to take treats until offered. I asked, and the trainer said the same routine should work with cats.
I tried with the boys this morning, refusing to give them the treat until they settled down.
Two words: cat-like reflexes.
Two more words: Cat claws.
Two final words: New flavor!
In short, the boys got their lovely new tuna flavor kitty treats without a full training session. I considered this fair, as they never had to wait before, and I still have all my fingers.