Re: the six small meals a day bullshit
The biggest reason more frequent smaller meals is recommended is to avoid over eating and/or having unhealthy snacks between meals.
If you eat 6 healthy smaller meals per day you won't get hungry between meals. But if you are only eating the big 3 you will be really hungry when meal time gets there and will likely over eat, or you will be hungry between and have a snack (bag of chips etc) to hold you over until the next meal.
Eating six smaller healthy meals is the way to go, regardless of any metabolism, fat burning truth/non truth.