Those tutorials are good to show the potential of the framework when is used by someone that have experience with it. But it doesn't teach you much about the process of building your own application. And watching a lot of those can damage your perception of the learning curve needed to build something because you think that it's easy.
I really like the approach of Michaael Haart in his RailTutorial, because he explain all the things that can go wrong and how to solve them. Because that is learning, trial and error. When you start a project by your own, you will have to face a lot of errors.
I told you this because some years ago I tried to learn ruby on rails thinking that it would be easy, I watched the zombie tutorial, tryRuby, and some 20min blog but when I tried to make my own application I felt frustrated and dumb for all the errors that I faced. But then I changed and some month ago I started again, but this time I approached it thinking that I will have to deal with the errors and my own mistakes , and that there is no easy or fast way to learning, just the old Try and Error.