I don't think its too late. If had your badge scanned when you came into a class, you should have gotten an email about filling out class surveys.
I cannot stress how important this feedback is. As a speaker, I know that I have taken the comments and ratings to heart and used them to help me improve. I credit this for my steady improvement over the past three years.
The results are also used my the selections staff to decide which speakers come back, which speakers could potentially wind up on certain tracks and how to improve the AU experience in general.
My classes both have are at about 60% reporting. That means there still close to 40 people out there who need to fill theirs out.
Don't leave me hangin'- tell me what you really think so that all of AU can improve!
If for some reason you can't get in to fill out the survey, or you wanted to tell me more than 200 characters can handle- email me anytime. Dana.Probert (at) autodesk.com