Wow, this one is amazingly specific e.g.
"True Measure of Distances - Measuring
distances must sometimes be done in 3 dimensions,
especially in the case of models placed in terrain
sporting several levels, or vehicles hulls which have
vertical parts. Measure the distance from base and
hull to base and hull, holding your tape measure at
an angle as necessary. When measuring so, any
part of the body of a based model is also taken into
account. For ‘body’ we mean a model's head, torso,
legs and arms, but not overly outstretched or
oversized parts of the models like wings, tails,
weapons, backpacks, banners, etc. This rule is
intended to ensure that models don’t get penalized
or advantaged for having impressive standards,
blades, guns, majestic wings, etc.
2.6 True Measure of Distances"
This is something I see different people playing differently all the time. When measuring a distance, some people only take into account the horizontal (shortest way). Others measure straight-line as described here (medium way). Others measure across, then up (longest way). Obviously makes a big difference in a game which one you do.
Maybe it's a pipe dream that people will start playing the same way... but a man can dream.
