I see what you're saying. But, I think it's more about the mindset than stuff like spending a 1/3 of practice time on it. After all, you have what, 4-6 plays really you need to practice in special teams while you have a book 3 inches thick on offense? That doesn't tell me you need to spend 1/3 of the time in practice on it....even if you think it's just as important.
One part of that mindset is what players you use on special teams. Some coaches don't want to get their starters hurt, so they don't use them. Others, find it so important, that they are going to put their starters out there if they are the best at it.