I recently tried La Tortilla Factory tortillas, which I liked very much, and which have significant total carbs, but low effective carbs (by memory, 10g total carbs, 3 g effective carbs).

If I remember correctly, it wasn't until the last few years that Atkins introduced the effective carb concept. Are people who really know about this stuff certain that the ECC is the number that matters, and not the total carb count? I fear that it is not that simple (not based on any science, just my gut). It just scares me that theoretically I could eat 4 or 5 of these things according to ECC, but I would be consuming a lot of total carb grams.