Yes. Having those interns right under their eyes and being able to watch them work for three or four months, in a summer school situation, allows the employer to take a better look at various aspects. They can look, not only at the interns’ technical skills and artistic sides, but also at their collaboration skills, their people skills, the way in which they work as part of a team and communicate with others. Those are important attributes for employees to have.
Just take a quick look at the statistics. From the 40 people at the most recent summer school, I think that Ubisoft kept between 20 and 30. I do not presume to speak for them but I think that it was seen as a good model for retaining new employees.