Interesting point, but what happens if you click "send!" and then close your laptop. Is your message sent or not? While your point about the server-end being

Interesting point, but what happens if you click "send!" and then close your laptop. Is your message sent or not? While your point about the server-end being a queue is true, there's an expectation once your message is offloaded onto Google's queue, they will reliably process the message in a reasonable amount of time.