Rob Maurer (Tesla Daily) just asked me via Twitter DM to pass this along to you Mike:
https://twitter.com/edmunds/status/1359950053184397314?s=20
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I guess it's worth to have it here in the public conversation, instead of a direct message to Mike.
That is the explanation I was expecting. I'm not buying it.
1) When journalists make significant factual changes to an article they always make a note at the end explaining what was changed and why. I wonder what Edmunds' policy is on this?
2) This was as major a change to an article as you can make - he's claiming he actually did a whole new test of one of the vehicles, with a new methodology and new results, and didn't bother to mention it?
3) The change wasn't made quickly - it was made over two months after the original article was published. So after two months he suddenly realized the results which had been circulating all this time were unfair to Tesla, but didn't bother mentioning this and instead just did a retest and published the results by altering the old article with updated results and a new date at the top?
4) The changes he made as a result of the new tests were both round numbers - a change of 10 in one place in the article and 15 in another, as one might do if you weren't expecting anyone to be able to see the original, unaltered article.
5) The fact that the range increases don't match (10 and 15) is very strange. He says the range increased from 253 miles to 263 miles, but then says the differential from the Taycan decreased by 15 miles. That's a very strange mistake to make. How do you manage to calculate 263-253 = 15?? Either that or he calculated the new differential wrong: 70-10= 55?? Neither of those are plausible errors to make. An explanation one might surmise is that he first decided on 15 miles for the increase and updated both numbers, but then later decided (or perhaps was instructed by an outside agent) to change the increase to only 10 but forgot to change the differential number.
6) In the original article he claims the efficiency he calculated in the real world test was 28.4kWh/100 miles, and in the retest was also exactly 28.4kWh/100 miles. If he did a new test which added only 10 miles by adding 11% more battery life, shouldn't the kWh/100 miles be higher? I don't consider this as serious as the other points since he can claim he just forgot to update this, but I thought I'd throw it in anyway.
Edit: Fixed to say article was changed over 2 months later instead of 3.