This would provide strong scientific evidence that there are quite some people in our society that are not very intelligent. I'd rather claim that this shows something that is rather evident than surprising.
Which is why the turing test is a liiiiittle bit iffy as a specification for "intelligence". It's actually pretty good as a test for behaving-like-a-human, but it's actually not very good for intelligence because humans themselves aren't particularly "intelligent" by many definitions, particularly in the regions where computers are strongest.
Yes, but then how many people would fail the Turing test? A non-trivial amount, I would guess.