We replaced the old 3.5 gallons per flush toilet in our house with a new Kohler 1.28gpf unit and it flushes and clears the bowl just fine - no worse than the previous toilet with about 1/3rd the water use.
It's has a small amount of water at the bottom that receives our "output". There are also no problems urinating as it is easy to either hit the water or the porcelain wall at the bottom, that are much more vertical. Most of the accidental splashes that occur are either because the man is drunk and can't hit the toilet, or that the foreskin is pulled a bit back and doesn't contain the stream as well as it should.
(the above is false, but it is unironically there so that you can look at your poop. admire the shape, the volume, the coloration. and just wait until you learn there's an easy at-home diagnostic test for diabetes mellitus!)