Can you expand on why you believe these sorts of interviews don't offer good signal? Having gone through a couple of these interview cycles, I felt the behavioral questions adequately demonstrated how I'd perform in similar situations.
Behavioral questions are fine. Some like top grading are not. I had someone ask me about my choices right from my senior year in high school and my choice of college, etc. Well, I was extremely depressed in high school and didn't do well in my entrance exams, got into an average college but was actively programming by myself and turned my life around in my junior year in college. I wouldn't have fit into the interviewer's expected stereotype of someone who has been excellent since high school.
