It is quicker now in Windows, at least if you're trying to interact with the program. It might take 30 seconds for the message queue to fill up without any user input, but I've had it pop up asking me if I wanted to kill a game that was doing some loading in it's UI thread and neglecting the message queue when the total loading time was maybe like 20 seconds and I was clicking to see if it was hung. After understanding that it just takes a while and waiting patiently, the "should I kill it?" message doesn't pop up.