Hi John

I think it depends on how far you go and how hard you go. The general rule of thumb is that solid food will not be converted into energy for about two hours. That's the reason for sports drinks and now gel, the gel digests faster than solid food. When you first eat a big meal a lot of blood goes into digesting the food and is not available for your legs and your stomach at the same time. This is really not a big deal unless you go hard or get going too soon after eating. I would say don't stuff your self and hop right on the bike and go fast, you may get stomach cramps. I think I read about your commute distance but I can't remember. If it's not a hard ride it does not matter too much. If you want a little energy for the ride, try some juice or fruit juice drink, that will covert to energy pretty fast. I've had it save me on long rides.
It's Maine-ly (sorry) a comfort thing.