But it does make a difference. A jam packed smaller stadium always produces a better atmosphere than a less full but larger one.
When Wembley only opens the bottom tiers for lesser cup finals or England games, it should be rocking because there's still 45000 people there, but it just feels empty and soul-less.
In League 1, St Mary's with 17'000 people in it felt awful, but 10'000 people packed in at Leyton Orient was amazing.