Nice thread!
I've used political compass and the world's smallest test in classes for years.
The distribution we're seeing on the group chart in the OP is very typical of what I see with my students--a distribution that would generally fit a line from the bottom left to upper right corners, with very few more than 3 points off that line, and more in the lower left quadrant than the upper right...in fact, most (~70 percent) in my classes score plus or minus four from the center of the graph. I've had a handful out of several hundred who have scored close the other corners, like
@Revoltingest
If one digs in more to the data about political candidates (presidential primaries, general elections, senators) our elected officials and candidates in the US are almost entirely in the upper right quadrant--Dems tend to be a little to the left and/or bottom of that sector, while Reps tend to be a little to the right and above the center of the quadrant. The differences between the two major parties in America is generally much smaller than between the major parties in other democracies--people from other nations often wonder what we're arguing about--from the outside, the differences seem so small.
I've taken the test several times, trying to vary my responses (because I have very divergent views on economics as it applies to individual enterprise vs. small businesses vs. large businesses; and also local government vs. state and national government), but I still tend to score in the lower left quadrant. I'll have to see if I can find some of my old scores to share.