I think the ADA recommends a 30/10/60 fat/protein/carb combination. Personally, I adjust the balance based upon total calorie intake.

hmm, that guy's programme doesn't sound too extreme or anything. It doesn't say anywhere how many total calories Larry was eating, but from the description, it's sounds like arouind 1700-2000 calories/day. If he works out moderately so that he's got a 500-calorie deficit per day as he mentioned, that's 1-lb of weight-loss per week. Nothing too dramatic or out of the ordinary either.

I've experimented with 80/10/10 fat/protein/carb ratios and lost weight that way as well. It wasn't very satisfying for me though because there's very little volume of food that needs to be eaten with that high of fat intake to get the 2500-6000 calories/day that I was eating (you can get 2000 calories of fat in a single meal, then starve the rest of the day).

I'm currently using a 25/25/50 ratio on my slow days to a 10/10/80 fat/pro/carb mix on my longer endurance rides. I've found that there's really no magic formulae. The only consistent number is the calorie-deficit. I've noticed that no matter what diet I have, as long as I keep that deficit constant, I'll constantly be dropping weight. Of course, some of those diets will have different effects as far as energy levels, muscle-catabolism, LDL/HDL balances, etc.