See what works for you. Dr Lowery likes it,while Dave Barr doesn't. Never seen much of a difference either way. For myself I'm usually starving when I wake up so not eating something right away is not an option.
It depends on the person (I know, not the answer you were looking for right?). My advice is, if you're looing to get lean, try it but watch how much muscle mass you lose in the process (if you do lose any). There was a recent round table discussion on this.
They also discussed maybe taking some BCAAs before to preserve muscle.
We should never be completely fasted. As soon as you're protein starved, you start breaking down muscle. Throw a catabolic activity like cardio on top of that and you're begging to waste away. Fortunately, it's not too difficult to prevent this muscle catabolism, because all we have to do is eat a little protein. When it comes to cardio, eating protein before will preserve muscle tissue without impacting fat loss. Metabolic Drive! is the perfect protein for this, because its slow entry into the blood limits the amount of amino acids that'll be used for energy.
Dave Barr. Like I said I don't think there is gonna be a huge difference in your results either way.