[cwyers]

I don't think I've experienced either side of this. I've never seen people who otherwise have reasonable expectations of response time go crazy because of Slack. And I have never, ever seen someone with unreasonable expectations of response time behave well just because it's e-mail. Especially since e-mail has been put onto smartphones, I don't really see a whole lot of difference in how people behave based on the size of the text box.

[buboard]

the UI s definitely differentiate. Typing indicators, compact display, persistent reply prompt ... these things prime the users over how to use the box.