don't over read it ... in short, most of what he says is accurate. But, i'll address a couple of the points directly:
Fat Burning Zone: this is the heart rate at which your body
optimally burns fat ... any higher, and you start burning protein as well as fat, which is less effective
but you burn more fat at a higher heart rate because you are working harder. I've addressed it a couple times in the forum, but using the
HIIT method will provide you with the best of both worlds.
As for working out in the morning, this again is what is considered as optimal. However, it can also be a bit dangerous, because if your body doesn't have an easily accessable energy source (carbs) then you risk such things as fainting. I usually have a glass of OJ because it gets into your system quick, but can reak havoc on your stomach from the acid and not having any food in your system.
That being said, working out later in the day is not going to be a waste of time ... if it was then so many people wouldn't still be doing it, right? By burning off those carbs during a workout later in the day (and some fat will be burned too), you are essentially allowing your body to burn fat OUTSIDE of your workout. Just because you are finishined your exercise doesn't mean that your body is done burning fat. I've read a few times that your body can continue to work up to 2 hours after a workout and this can be even further optimized by building muscle, since muscle is one of the best resources for burning fat.
I hope this has clearified things a bit for you.
Cheers