I have tried eating on this schedule fairly consistently for a couple of months.
I have not experienced any significant changes in body composition (at least nothing that I attribute to The Warrior Diet). I feel more energetic and focused during the day when I eat only fruit and veggies before dinner. It is easier to avoid overeating this way.
There are some useful related resources:
The Fast-5 Diet and the Fast-5 Lifestyle (a similar diet)
Caveman Power - fit, healthy, energetic, mentally sharp, emotionally potent and wonderfully creative. The Warrior Diet Bodybuilding.com - Mike Mahler - Conversation With A Modern-Day Warrior : The Warrior Diet! Fitness Tips To Get Lean and Toned, Not Bulky! | The Fitness Black Book (this guy has a number of posts on this topic, and many comments from people who have good results)