I gotta admit this entire topic has got me bamboozled. I just dont understand people interest in measurement.
What difference does it actually make what measurement unit you use. At the end of the day, relativity of range vs time is all that really counts. In fact, back in 3.0 we gave up on using "real" measurements and started referring to these things as "distance thingies" and "time thingies".
So distance from one point to another was X "distance thingies", so can my bow reach X "distance thingies", or how many "time thingies" will it take me to get there.
Realistically it didn't even matter in game terms that these didn't equate to any real world measurements, the game works no matter what distance unit you use, as long as its consistent through the whole game.