Yes, stats were taken world-wide and averaged out. They were also adjusted to meet the scale mentioned, and then the final regional results were averaged out to represent a global number. The numbers in those tables are both averaged and calculated up or down based on Seasonal/Non-Seasonal data from a few weeks after the 2.6.7 Patch.
This made the Seasonal data effectively projected at the time, since most people were only around 1-2k Paragon when that snapshot was taken. Everything’s calculated from real results and data entries, they’re just not “exact” results on their own. Based on a combination of time, luck with GRift fishing, and developed skill for various builds, many of these numbers have gone up over time (Matt and I were looking over more recent ones just last week). That’s part of why we look at a LOT of data and never just one snapshot; sometimes issues take time to settle or show up later than anticipated.