I haven't worked the tutorials, so I wouldn't know. I just know the type of site, and their goals are totally different than ours here. I probably will work the tutorials later.
I have done the tutorials and I think they are just fine for what they are intended for. I don't know what those guys were expecting out of it.
There's nothing there, beyond the most basic syntax of the language, and that is very poorly presented. For you and me, who are already familiar with the basic loops, it's all very simple, but we're not going to get anything out of it because we're already there. For the beginner, I think this does not exercise the concepts enough. Correcting one for loop is not enough to get the idea into your head. More exercises would be the minimum to make plausible.
The language in which the concepts are expressed is not very clear - again, you and I know what they mean because we've done it already, but we're not the target audience.
The layout is very poorly thought out. You have detailed instructions (which are the first place the beginner should look) in a smaller, lighter typeface in a borderless box, and you have the problem the student is supposed to solve next to that, in a bigger, darker typeface in a bordered box. Where do they look first? What are they going to be paying most attention to? That's right: the wrong thing.
All in all, this is pretty clearly a couple of guys making quick demo in the garage. Could be a useful idea, if someone who cared were to try to do it. Isn't useful now.
Thus, bullshit. Does that clear it up?