[someotheruser1]

I just checked - it is! Nice.

Preferences -> Messages & Media -> Display Options -> "Display information about who is currently typing a message"

[Stratoscope]

Oh - thanks! I was looking for that option. In fact I'd opened that preferences page several times and just didn't figure out that was the option.

The wording definitely threw me off - this would be a much better way to word the checkbox:

  Display "someone is typing" messages

[TeMPOraL]

Is there an option to disable sending that information? I.e. can I make so that people don't see that I'm typing a message?