After having the results from the tutorials questionnaire, I concluded the following:

• The opinions around focused vs. complete tutorials are split almost even (56% vs. 44%). However, someone uggested that he prefers focused tutorials (as text) and a download link with the full project. In my opinion this idea is great.
• Most people prefer tutorials of a difficulty level above or equal to their proficiency level. However, there were a few anomalies  in the results: some that ranked themselves as ‘Advanced’ or ‘Intermediate’ prefer beginner tutorials. This might have two explanations: they prefer beginner tutorials for the other programming fields or they just overestimated themselves.
• The result for the tutorial format is conclusive: almost everyone wants text + images. Just a few prefer video tutorials.

So, the final result is: intermediate or advanced tutorials, presenting just the essentials parts as text but allowing the download of full source.