I think the most impressive part of this regimen would be not snacking. Having cheap, high calorie food / beverages available in, say, vending machines is a major problem that can bump people up in calories quickly. Add to that highly available / cheap fast food options (with giant cups of sugar water) and it becomes much worse.

This article is a good summary of how a crappy person's local food environment can be: http://www.hsph.harvard.edu/obesity-prevention-source/obesit...