I had to write a 11 pages long written interview. Canonical didn't spend 5 minutes to send a short feedback. They are saying they don't have time. But if (I hope they do) they take time to read the interview, it must take them 30 minutes minimum, so an extra 5 minutes for a feedback with the interviewer would be nice.
Here are the details of the interview :
A general Intelligent assement : an online form to measures reasoning, perceptual speed, number speed & accuracy, word meaning, and spatial visualisation
A written interview : You have to fill in a written interview with lot of question. Mine took 3hours to complete and 11 pages long.