Can't say I agree. I'd much rather a well behaved adult dog that I can actually do things with. Puppies are too hyperactive and easily excited.
Far off. We've been breeding for 20 years and can say from pure experience that is not true if you teach them not to. It's really easy, and if you have a hyperactive puppy, it's you're own fault. I takes 1-2 days of training and that problem is gone. A lot of times, they aren't hyperactive just like that either. 90% of people teach the puppies to be like that without realizing it. Puppies alone are (for the most part) not hyperactive. ( sometimes you have the occasion where they are, but for the most part they aren't. )