Its nothing like that. It doesn't matter if bitcoin confirmations are slow or what. When you send you bitcoins you can not really revert the payment so the buyer is is assured that he will get his money. Also, you can negotiate fees and ask buyer to pay half and you will pay half that way confirmation would be faster. the only problem is the damn coffee or soem case of real life usage, but bitcoin is not good yet for micro transactions we all know this, speculation is good now for bitcoin, it help the value grow where it should be