You're probably overthinking this. The dev may not have been particularly invested in your hiring process. You also unloaded your whole spiel at once, thus ther

You're probably overthinking this. The dev may not have been particularly invested in your hiring process. You also unloaded your whole spiel at once, thus there wasn't really anywhere else he could take the conversation. You're one candidate out of many, and he might be thinking "well, that was a bust, guess I'll go for my coffee break". Your phone call could be a distraction from his regular routine and he just wants to get it over with. Just to add on to that, when you get to thanking people for the opportunity, that it was nice to meet them, etc, you're basically giving a social signal that you're ready to disengage. He simply obliged.