You can also add the number of duel feeds in HD.
Keep in mind, the the number of HD games for CI (about 1/2 in HD) and LP (about 1/2 in HD) even on Direct last year was still not near as many that were offered on EI (almost every game in HD) and ST (all games in HD). This year may be different though.
This year on DirecTV's website, they are claiming up to 40 games a week and up to 20 of them in HD (again, about 1/2). Although when I looked at last year's schedule it looks like much more than 1/2 were in HD.
Dish network's website is claiming up to 40 games a week, but does not say how many will be in HD (they state only "select game broadcast in HD"). Probably for the reason you stated. They do not know how much bandwidth can be allotted on any one day well ahead of time.