When we drew 20,000 or more, I didn't feel like SF was too big. People crowded down and it felt reasonably full, because there were people around you and a mass of people across from you. Even if there were many seats available in the sections that were populated and the upper seats were absolutely vacant, it didn't seem too bad to me. Below 14,000 and it did seem pretty empty. But I think we're pretty close to the day when we'll regularly draw 20,000 to Soldier Field (at least on weekends.) We seemed to have found critical mass last year, though we'll have to start over.