It makes me sad and annoyed whenever I flush one of these toilets. The swirling doesn't do anything useful. It seems to actually increase the clogging probability because it typically manages to swirl 100% of the toilet paper together and then finally move it downward all at once for maximum clogging effect, which might be fine if the drain weren't ~2 inches across.

There are American toilets that aren't like this, but a shocking number of them are completely unreliable. I had a toilet in my apartment in California that, no lie, I managed to clog by blowing my nose. I used 3 Kleenex, dropped them in the toilet, and flushed. It clogged from that.