I had a time where it did work and it sent feedback to two people within 3 hours of when they left me a positive feedback. But...that was about a week ago, and that is the last time it has worked promptly.
I'd put it in the 'broke' category for me as well. I have to keep going in and leaving feedback manually. I've even left things waiting for 2 days to see if it would happen but they have not been given auto-feedback.
I wanted to leave things longer than that to see if it ever got working again...but I just can't. Leaving prompt feedback to me is one of the cornerstones of running a good business...
Mike