>>2455946I'm not a Madoka expert, but I think so.
http://www.onezerotwo.net/2010/12/madoka-infodump/>School uniform: Designed to convey the classy image of a private girls’ school, while not being -too- normal. Its distinguishing point is the small hole at the nape of the neck. (Aoki)That makes it sound like she designed them.