I bet you don't believe this: cavalry charge is broken.

[hrvojej]

If I'm not mistaken, charge bonus factors in the calculation to see whether the hit landed. That is, it enhances the attack value to put it in simple terms. However, whether the hit landed and whether the hit killed are two separate things, the latter being linked to the lethality stat.

If the killing chance is low, you wouldn't necessarily see too much difference between the high charge and low charge units in a few tests. So, for example, if there was a 20% chance that each blow that lands also kills, that would mean that even if all blows land, killing would still be fairly low and feel random.

Now, to assert these claims for sure, one would have to do the proper stats procedure with proper sample sizes and blah blah, but it would of course be way easier if we could actually stop assuming and get info from the devs about combat calculations. But since it seems that won't happen, your guess is as good as mine (unless one of us actually gets to work and does several dozens of boring test runs, that is).