Is this thread going to attract every short shill? Why would shorts represent themselves as "Teslainvestors" when owning shorts is not investing in the stock, especially not shorting and then trying to spread FUD- part of why shorting needs to be illegal. Someone bets their neighbors house won't burn down then they go and burn it down and then collect on it.
I think you are confused a little bit here. For things on consumer opinion on cars (customer satisfaction, reliability etc.), asking lots of consumers is the way. But here, this is just the cold weather testing. I don't know how asking customers helps here.
That survey is just one thing CR does. They also do their own tests and publish results. Do you remember last year it was CR that found the Model 3 braking issue? Tesla's QA department should have found that, but Elon fired the QA division and rolled out beta cars. So, CR did the test for them and published the result, which are correct. They did not need to ask millions of Tesla owners about their braking distance. They wouldn't know, and most would be dead by the time they will know the bad way.
So, CR is sometimes doign more than just survey. It is doing its own testing, andhelpignboth companies and buyers. A statistical survey is not needed for these.