I have to say that it does make me sad when you see a lovely effort (no matter how big or small relevant to the dog's experience level) from a dog and the owner says nothing.
I'm far from perfect with my timing sometimes, but I love having a party! I love the constant feedback loop. If I wasn't going to interact with my dog when training, I wouldn't bother training at all.
I have one dog that is a very serious individual (avatar girl), rather difficult to motivate and really happy to find something better to do unless I make the training fun, fast and worthwhile for her. There is no way I could just ask her to do something and then not have any reward or motivation system. She'd just give me the finger and that would be the end. I like to see her happily working with me, excited and keen. But I have to work for it. One of the best gifts she's given me IMO, some hands on experience at how dogs don't do it for the love at all (I'm laughing at the suggestion now!) and the importance of finding the fun in what we do. She has value for a lot of what we do now (for example, she loves any form of shaping/tricks) but it has taken an awfully long time to get to that point.