A polish Demo ? Well that should mean the english one is soon to come, unless the polish one was released some time ago..
And 5-6 hours ? Well i think that says alot about the whole game if they can make a demo that lasts that long
Most demos nowdays are an hour at most... but 5 to 6 ? Well it is a good indicator of the full game as i said, unless Katauri went mad and decided to add a large portion of the game already
@Cooler: Well if the polish is out now, then the english will most likely come soon, so why not wait for that instead ? .. Unless of course you are from poland