yes I think you're right, in how on low carbs you are more in tuned with the body and it's feedback loops, while on high carbs it become more of "foreign body" in a sense.
it's probably hardwired into us
residual carbs from a high carb day going into a low carb day get used by the muscles no doubt about it..
but the low carb day you dont have to worry about the glycemic index weighing you down because the carbs are already in you
dreams/dark energy/information from the future are more readily available when i sleep on a low carb day. perhaps insulin=carbs=my grains=migranes cause the brain to inflame too much thus smears the dream
dreams=smaerd= smeared =confusion or less clarity