Putting the prop in the 2 o'clock position comes from when an engine is started by hand. When the prop hits compression at 2 o'clock it's in the perfect position to "throw" the prop through the compression with a chicken stick. There is no timing or any other reason to position the prop like this.

For dead sticks you actually want to position the prop so that it is in the horizontal position (level with the ground). This way it's very difficult to strike the prop on the ground when you land. You also want to position the prop like this on planes like the Sig Wonder and Lanier Shrike that have no landing gear and are landed on their belly. When the engine is killed for a landing it will be level with the ground and won't be in the way when landing.

Hope this helps

Ken