I don't get how the 60D rated range could be 200 miles. If the Wh/miles is the same as the 75D (same motors and same battery only limited by software so I would imagine same weight) which is 316 Wh/miles (75 kwh/316 Wh/miles = 237 miles) then the 60D would have a max range of 60kWh/316Wh/mil= 189 miles. The math does not work out the advertised 200 miles. BTW when the 70D was available in the design studio the rated range was 220 miles that works out if you do 70kWh/316Wh/mil = 221 miles. Not sure what is going on with the 60D, maybe smaller and more efficient motors.

the fact that you can charge to 100% daily may offset some of the realities of the software limited battery

So I'll start by saying that this is pure speculation on my part. 200 Miles has been a magic number quoted by Elon Musk a number of times. I would guess that the 60D "software limit" is actually greater than 60kWh, in order to meet this 200 mile number. If that is indeed the case, then new X60D owners are getting a bit of a bonus.

Interesting that, in a Model S, the 60D has a top speed of 130 mph while the 75D has a top speed of 140 mph.

Slow down 5mph and all will be well. Remember the speed at which the 200-mile estimate is offered. If you live in, say, Utah, and the speed limit is 80mph and your commute is all highway at 85mph, your practical range will likely be less than 200 miles, unless the commute is downhill both ways. On the other hand, if you live in Brentwood, commute to El Segundo, and have an unnatural attachment to the 405 during rush hour, then your practical range will be Absolutely Fabulous because Teslas do very well at 25mph.

I kinda remember some dude going over 500 miles on a charge. He drove like 20 mph the whole way as an experiment

I was reading the Model S forums and ran across this +10% Energy Efficiency after 2.24.102 Update Could this update bring enough improvement for the X where X60D gets the 200 miles? Thoughts?

Exactly my point. Almost nobody drives at rated *all* the time nor to 0%. I don't care what number the EPA foists upon us - it shall be greeted with a generous grain of salt.

Would that also mean charge rate to "max" would not be decreased since you are not actually topping it off?

Yes. Much less taper. The 60 really is a sweet deal in so many ways. Just charge to 100% all the time, use a little more time charging on road trips but in every other sense you got yourself a 75.

Not to my knowledge, but I would be flabbergasted if they put an artificial taper on software limited 75. Back when the "40" kWh Model S was sold it was disallowed from supercharging unless it was unlocked to a 60, so we don't have any precedence there.

We know there is some reserve capacity on the battery for anti-bricking and protection. If the 75 is really a 71kw "useable" pack then we get 71kw / 237mi = 299.5 wh/mi if tesla is providing a 60kw "useable" power then we can get 60kw / 299.5 = 200 miles this is of course assuming you can drive at 300wh mi efficiency.

After 16K Miles in my S70D, the average is 329Wh. My average driving is commute at 50mph 45min not very heavy traffic. For S60D that would come to 182miles range on full charge and with a margin of 36miles I would say about 145miles on a charge. For my X90D, the average after 5K miles of mostly highway long road trip is 349Wh. That computes to 172miles range on full charge. Keep 35miles for safety and you are down to 135miles on a full charge. That's barely enough for two days of daily commute and definitely unsuitable for road trips as superchargers are at least 150miles apart.