Oh, at the time, I probably felt miffed over it, and maybe once responded with a juvenile signature, "Sent from my iPhone that your mom bought me".

But, more general than incidents of iPhone bragging/enthusiasm, I have more data points now, of different people's various motivations and thinking, and I try to remind myself not to get bent out of shape. Kinda like in David Foster Wallace's "This is Water" commencement speech: https://www.youtube.com/watch?v=8CrOL-ydFMI