[kevincox]

> I intuitively understand that if we both write messages at the same time, we will see them in different order.

I think you are thinking like a distributed systems designer. I would assume that if you asked 10 "random Americans" 9 of them would assume that someone managed to send their message first and would be surprised if their phone and their friends phone showed them messages in different orders.

[dwattttt]

Many people have had the experience of "I tried to call you, but you were calling me!"; I don't imagine they'd be surprised if "something weird" happened when you both tried to send a message at the "same" time.

[Kwpolska]

I would assume 9 of them would not care either way.