On startup Mist tries to download latest Geth release, but it doesn't inform user about that. For user it looks like app has been stuck for a few minutes.
User comments:
On initial install/startup, the purple window popped up with the ETC logo in it. Seemed to go fine, but then there was a small hang up when the window read "Loading Client Config" "Checking Network..."
I kept it there for maybe 5 minutes. I didnt budge, so I closed down the program, and restarted it.
Same thing on re-start, but the "Loading Client Config" "Checking Network..." completed in a few seconds. So, all was good.