I've given feedback to dozens of candidates over the last 3 years, only when the candidate has specifically asked for it. In all cases people appreciated that another human gave them an honest impression of the interview.

Perhaps "quickly enough" is over 3 years. Regardless even when it does go poorly with one candidate, I've had 3 years of people I've at least been a normal person to, instead of acting like a drone who is constantly afraid of the proverbial lawsuits from candidates.