Kitchen Bench:
As mudrat_02 stated, they aren't looking for ability to fly, just a rate of learning. Essentially your ability to develop your skills and learn from your mistakes. An example of which would be for the instructor to demonstrate a wingover to you, teach you to do it and then let you have a go. You end up failing abysmally at it by yourself so he reteaches it to you and your next shot is a better. If they see that then they are usually happy.
Having said that though, It certainly doesn't hurt having a few lessons to get rid of the initial shock of being in a cockpit the first time. Also the initial hand/foot/eye co-ordination will also help along with a BASIC level of knowledge on how an aircraft performs (Power + Attitude = Performance etc etc..).
5 Hours would seem reasonable but I would caution you to not listen to much to the "civilian" way of doing things. The military is very specific in its way of flying and any habits you may pick up can end up being very hard to get rid of later on down the track. Having said that though, bad habits are usually found in people who have a large amount of hours already under their belt and I wouldn't imagine 5 hours would be sufficient to develop any habits at all really.
Hope this helps and all the best!