I've been working on this project for almost 3 years and have finally gotten to a point where I'm close to getting a finished product, so no, it's not a matter of commitment. College financials are not a concern (and my grades are very good, the CS department is just anal). I can make a quality product, but shipping it and making money off of it is what's up in the air.
You are correct in that it is entirely possible for me to do both college and startup at the same time, I just don't want to be carrying a 5 pound rock with me on a marathon if I don't need it.