Yeah, for someone to claim that they managed to hatch all three (and not just them, but several others who are showing off completed Pokédexes), they'd have to be way more common than 1 in 40,000.Super rare is an understatement, poeple on /r/TheSilphRoad gathered data about the eggs they hatched and in 40000+ Eggs there were 0 Pokemon from other regions. In all the time the game was out no one could prove that they hatched a exclusive Pokemon from a diffierent region that theirs, so it's pretty safe to say that with the current information and statistics available, everyone claiming it is either a spoofer/cheater or has been on a holiday and obtained the egg there.
I mean, a concerted data gathering effort results in no region-exclusives hatched except the native one, but then you have unsubstantiated (but also, unprovable and undisprovable) anecdotes that it's been done. I just gotta call fib given the statistical improbability of it all.
That's possible, but the game has launched in South America. Do we know if Tauros appears there or not? If not, then any data from there would prove or disprove that.L.O.R.D. says he's from the middle east. I would think most of the reports of hatching came from the main regions of US, Europe, Japan, etc.
Has there been a sample size from areas that aren't any of the regions these Pokemon are exclusive to? Because the middle east and some other regions wouldn't have any Pokemon exclusive to them, so maybe they are all there.
If I were to guess, it would be that Tauros covers both North and South America, while Mr. Mime covers the Middle East in addition to Europe.