From my limited use of Bitcoin, the merchants only required the transaction to be broadcast They didn't care if it had 0 or 1 or 100 confirmations. They only cared that it was broadcast. Which makes sense. Considering they all apparently only did 4 Bitcoin transactions a month if not less. (2 cafes and a pub)

This is completely different to how online stores have processed my Bitcoin. Usually waiting for 1-2 confirmations before shipping (Trezor is my example here)