When I was at the front of the room w/several others (pretty sure w/Mark Perry) after the meeting was over, my recollection was that he said the GOM used to jump around all over the place and that the TSB referenced smoothed it out. Hopefully someone else can either correct or confirm the conversation and elaborate more...
Yes, I was there. Heard the same. I mentioned "maybe a longer history of data, and more smoothing would help some."
I had a conflicting thought:
#1: Having a raw number to remember is handy as you get out of the car and walk somewhere for a while.
(e.g., Remembering to self that I have 50 miles range available as I ponder my next trip in the car.)
#2: Having a numeric value makes it seem like fact then it lets you down if you don't actually achieve that number.
So in some ways, a gas gauge style needle instead of a raw number might help avoid people getting so "up in arms" over the inaccuracy of the number even thought it isn't as memorable as a specific number.
By the way, using the RangerEV as and example again, it has a needle, not a specific number, which made it clear it was an approximation. Gas cars tend not to have a "distance to empty" indicator at all, so perhaps it makes sense to only show approximate "amount of fullness" of the battery, and not even try to project range? (From the gas days: "Hey, how far can we go?"..."I don't know exactly, but I have only 1/4 tank so we need to think about stopping for gas if we want to go someplace far.")
Another idea - if they had the screen real-estate to support it, they could have the "min/max" circles on the NAV map showing projected driving range that way all the time instead of a numeric gauge. It makes it clear it is an estimate, and gives you and idea of your possible trip area without showing a specific number.