Very surprised to see the US at the top of the table and by such a wide margin.

Makes me wonder the basis on which they've calculated these things, as it's only described in overview, which doesn't really let you think about and analyse the numbers.

They mention real estate or housing wealth is excluded. (BTW I presume they therefore exclude mortgages on the liabilities side). For many/most people their house is their biggest asset, sort of undermines the whole results.

It's often what's not there rather than what's there when we look at these surveys.

The other thing that skews the results are the ultra wealthy. Bill Gates, Zuckerberg, Buffet etc, will certainly skew US averages. I always like to see the median as well as just the (mean) "average".

What springs to my mind on this topic is the quote. There are lies, dammed lies, and statistics. As said, disproportionate wealth does tend to skew the facts a tad.