So, are you saying that for a person who is trying to build muscle and cut a little bit of body fat at the same time high-glycemic starches are ideal, even though they inhibit lipolysis and store fat in adipose cells? Where does fruit play a role in this situation?
For a person trying to build muscle, high-glycemic starches are ideal because they spike insulin. Insulin pushes protein into storage, increases protein synthesis and inhibits protein-breakdown. The downside to this is that the high insulin spikes will slow fat loss (thou as long as your eating a very-low-fat diet, insulin spikes will not add any new fat).
For bulking (muscle building) I recommend: flour, potatoes, white-rice, grits, flaxseeds and beans... less vegetables (but enough to get your vitamin-C) and more weightlifting. You also want to stay in a calorie-surplus (eat excess calories)!
For cutting (getting lean) I recommend: barley, pasta, oats, beans, sweet-potatoes, less starch in general and more vegetables, fasting and cardiovascular-exercise. In this stage you want to be in negative calorie-balance.
The calories in fruit are fructose. Although fructose is a carbohydrate, it actually converts into fat once eaten. Therefore the calories in fruit are diverted into fat rather than muscle. Studies show that when people overeat starch, most of the excess calories are stored in the muscles, yet when people overeat fat or simple-sugar, the excess calories are stored in fat.