I would bet it would work over time. Basically if you are going to workout a lot you def need to have your good carbs in. They say you should eat them ideally an hour or so before and after exercise but I think if you get up and workout first thing and eat them the night before theyr'e still in you. Basically though as long as you are eating a well balanced diet you will be fine. You can't just eat like crap and then pack on the carbs the night before and have it work miracles. I know that's not what you're doing but that's what a lot of people think when they are talking about how to eat for exercise.
This quote is only about eating after exercise but it works roughly the same way.
"Studies have shown that 15 - 60 minutes after a workout is the optimal time to eat carbohydrate rich foods and drinks (e.g., banana, bagel, orange juice) because that is when enzymes that make glycogen are most active and will most quickly replace depleted glycogen stores in the muscles. Protein also helps with recovery in that it repairs muscle and helps with glycogen replacement. Eat a few slices of turkey on a wheat bagel, or have a large glass of protein fortified milk. The most important nutritional strategy post workout, though, is fluid replacement. Drink water, juice, or carbohydrate rich sports drinks to replace what you sweat out."
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