I personally believe that fasting should never be done for the purpose of weight loss, but I agree with what the article is saying. I do the majority of my training rides very early in the morning (8am or earlier)... not because of time constraints, I just like to. If the ride is less than 2 hours long, typically I do it without eating any breakfast or eating during the ride. I usually carry some food to eat when I am doing my cool down. I also have a snack when I get home before stretching/shower. Then I eat my meal (which is still usually within 30-40min of getting home). I usually don't eat any breakfast before longer rides, but I do eat during the ride.
I have never felt like it has made my performance suffer (power meter supports this)... and I feel better when training on an empty stomach. I can't prove that it's helped my training or physiological adaptations... but it seems to be working for me! I've hit no plateaus and see steady improvements in fitness.
Well, that's certainly encouraging. I wouldn't do anything in excess of 2 hours training on an empty stomach without taking some energy gels etc. That'd just be asking for trouble. My main concern is just that I don't want to hinder my training.
As a whole, I like the idea of intermittent fasting. Basically, you're still eating the same calories as you would normally, depending on your goals but, it's just sandwiching all your meals into an 8 hour period. I highly recommend reading some of the other articles on the site.