Does that even make sense with the current transaction times and fees? You are going to pay more for the fees than for your meal. Unless the fees go down drastically, it makes no sense to use bitcoin as a daily payment method.
The idea is great. But that doesn't make sense with the current transaction fee. And basically in this case, we are going to pay higher. So if in case this is true, im sure that it wont work for me.
Bitcoin's usage is not practical in McDonalds. Transaction speed is low, and the fee needed is very high. No reason to use it for payments in the range of $1-100 clearly.