Correct, but it is indicative and always has been. I do not believe anyone has ever won the popular vote by more than 3% vote has ever lost the electoral college.
Somebody else did a private poll that was similar a month or so ago and got similar results. Problem is that the same number of polled voters in each states gives Wyoming the same weight as California. You could start with this data as raw data and then work backward weighting each state’s result factored by Electoral Votes and then you would have something.