At Buffalo Wild Wings, are the wrings free if you finish them in fewer than 6 minutes?

I was planning on going tomorrow in order to do it the second time. However, the first time, when I went, I remember paying for either my drink afterwards or both the drink and the wings. Also, they didn't have any shirts and told me that I would have to come 2 or 3 weeks later when they had shirts available. It's been almost a year. Do you think I can get 2 free shirts (once I beat tomorrow's challenge) and the free meal, which is what I am actually going for right now?