I can't measure it but I wouldn't say it is half a second. Its more like a second, half a second fade in, half a second fade out. I wouldn't know why a piece of software would need that much time to switch state, that should be a single tick kind of deal. Instant to the eye.
Doesn't sound like a lot when you just say it, but I frequently switch to the map view because of these darned mazes with walls that look all the same. And then it starts to really be noticeable. Minor gripe of course, which must mean the game is quite good
