As the guy who irritated his colleague Alvar I should answer to his post: First things first, was the “85%” made up? Yes, completely. Period. So why have I done this? It is a little trick to give critical people something questionable so they start to
make some research by them self and start a discussion. Nothing better can happen! So I knew that some teams at MS use SCRUM (or a modified version) and it worked, the discussion has started. Maybe this trick is unprofessional, but it work sometimes.
You betrayed the trust of your team. You failed as a leader. Not just lying, but the arrogance you show trying to explain it. If you expect technical excellence and accuracy from your team, then you need to work on yourself first.