Gallup Consumer/Brand Survey Researcher interview questions

I was contacted by Gallup for a 30-45 minute first telephone interview which went very well. I then was told at the end of that interview that they would call to set an additional interview. I went through the 60 minutes of the second phone interview a few days ago and got a rejection letter today. These interviews are tough. You are asked rapid fire questions and must answer off the top of your head. The second interview was more difficult than the first because every question was followed with "Give an example". After 40 minutes of this it begins to wear you down a bit. If I could do it over I would have written down multiple work scenarios corresponding to things like leadership, assisting others, etc. The bottom line is that they put you through an awful lot for a simple face to face interview. I really dislike that they provide zero feedback as to why they didn't select you, especially when you have invested that much time in the process.