It's actually the opposite of what you describe. The company I currently work for participates in the Duales Studium. I've seen very good projects the students

It's actually the opposite of what you describe. The company I currently work for participates in the Duales Studium. I've seen very good projects the students did for the company, while they interacted with the usual software development teams. After the study they exactly knew what they had to expect working full time and they moved into the teams without any effort. Additionally there is a lot of respect for the students, because they demonstrated cool stuff early on.