My point was that my experience has been that carbs consumed 24-36 hours before a session have a far greater impact on performance than carbs consumed 90 minutes before a session. As in, the day after a moderate carb intake, I have great workouts and the day after lower carb intake but carbs 60-90 minutes pre-workout, I don't. Others have indicated to me that this is the case with them as well. So, consuming carbs 60-90 minutes before offers (IME) little performance benefit, and blunts fat oxidation during what is for many people one of the biggest energy drains of the day. You do the math. The focus WAS on improved performance, which also happens to coincide with optimizing fat oxidation. Of course, this only matters if you're ONLY eating carbs at ONE particular time (pre vs. post). Otherwise, you can just throw all of this shit out the window because it really doesn't matter if you're consuming carbs throughout the day because the effects of food aren't immediate and acute in nature.
RE: HITT, EPOC accounts for maybe 80 calories over the course of 24 hours. The bigger benefit to it is that you're burning 500+ calories during the 30 minutes or whatever that you're doing it.