Mud Movement penalties seem low

[Bacillus98]

I wanted to start a discussion about mud movement in the East Front PzC games. I am using M'41 for the basis of this discussion in particular. Rasputitsa does not pack a punch in regards in penalties. I have looked in several sources, including Osprey, Col. Seaton's book, and several scanned book pages from my local university library. Here's what I was able to dig up. Tracked vehicles were able to move about 80 km in 4 days to move to attacking positions from Mtensk to Tula for example. This was considered very "fast" by the German High Command. When compiling the averages of my sources, it comes out to anywhere from 13 km to 20 km a day. However, this was along roads only. Wheeled vehicles often fared worse, and often had to be towed to become unstuck from the quagmire. Infantry didn't fare much better. One corp averaged 14 km a day, and that was with 24 hour marching. In summary, tracked and wheeled vehicles were mainly confined to roads for both sides in the East Front. Infantry could go off road, but progress was very slow. I understand PzC calculates the average speed a unit moves in a cohesive fashion and not the individual. Translating the speeds from above, a tank or wheeled vehicle could move approx. 2 hexes on a road and infantry would move 1 hex on or off road. Assuming that as long as the MP cost isn't 0 or a negative value, a unit should be able to always move one hex. I propose a mud penalty of somewhere between 400% to 600%. This seems to be the easiest way to have units move very slowly during mud turns, as they should. I believe Volcano Man's alt version MP cost for wheeled/tracked vehicles in on and off roads situation could also be used to further achieve realistic movement rates because as it stands units move way too fast in mud, especially off road. Play or look at the Tula Scenario in M41 and you will see what I mean. What do you guys think of the suggestion?