Here are the rumors from Whitehat we are looking at.
Random Charges are 2D6 pick the highest
through Difficult Terrain where its 3D6 and you drop the highest
Move through cover I believe adds an extra D6
What is the average distances and distribution of chances to make those highly needed assaults during a 6th edition game? To find out, we need some people better at math, or at least willing to put more time into it than I.
(Rumors are rumors, and I prefer to wait for the rule book before doing my own figures)
2D6, highest roll counts (open ground) gives an average result of 4.5".
3D6, drop highest, second highest counts (terrain) gives an average result of 3.5"
4D6, drop highest, second highest counts (move-through-cover) gives an average result of 4.1"
So, yeah, small differences, but an inch less is still an inch less.
here's the distribution of chances
3D6 pick 2nd highest
result 1'' : 7.4%
result 2'' : 18.5%
result 3'' : 24.%
result 4'' : 24 %
result 5'' : 18.5%
result 6'' : 7.4%
on 2D6 pick highest
result 1'' : 2.7%
result 2'' : 8.3%
result 3'' : 13.8%
result 4'' : 19.4%
result 5'' : 25%
result 6'' : 30%
so even though the average of each is respectively 3.5 (3d6) and 4.5 (2d6), the likeliest result is 6 with 2 dices, where it's 3 or 4 with 3 dices.