In your wiki article, you list all your demos under "Examples". Maybe it's just me, but I feel that the explanation of how to do the thing comes first and then examples just give a real world example of what you learned. The examples to me just seem like instructions on how to do the thing rather than an example of how to apply the thing that you learned.
Recently I have been adding at the beginning of my supademos a step that says to upload the supplied Project and Batch to the environment or indicates that those have been uploaded. I've run into a few people here that have gotten confused as to where or when to upload the files. Just a suggestion of what we might want to start adding to supademos.
In the Supademos, where it says "we'll use the default Delimiter property setting of a comma" I would add "if the document were using a different delimiter, we would change this property." or something along those lines.
The supademos for Named and Positional show what can go wrong with each method rather than showing what it looks like when it properly works. I would show what it looks like if it were to work properly, then show a slide or two of what it would look like if it doesn't work properly to highlight the limitations of the methods. Right now, it feels like the limitations of the methods are what you are teaching rather than how to do the thing if that makes sense.