Considering how much more popular the Galaxy S Phone is in Korea than outside of it, it's entirely possible that the Galaxy Tab is similarly popular there.

I suspect that's true, as you can't presently buy the Wifi only version in the U.S. (but apparently you can elsewhere).

The only breakdown Samsung has released is that 100,000 of the 1M are from Korea. US carriers aren't releasing numbers. All the articles I've found on this are just parroting the press release.

There is still a huge question here of who are the buyers. Being more expensive than the iPad and there being plenty of anecdotes of slow to nonexistent sales (at least in the US), I can't imagine who that might be.

I have only seen two iPads so far, because friends of mine bought them. The world's population is bigger than 1 Million by an order of magnitude.

Also, several of my friends at least twittered about playing with Galaxy Tabs, so they are out there in the wild.

Rest of Asia and EU. Bunch of Galaxys here.