In an ecu where you can adjust the EOIT based on RPM its been said that injecting during peak piston velocity (intake stroke) is ideal for power situations (3k+ i guess)
Whereas near idle speeds you do not want to spray into an open intake valve due to potential for cylinder washing.
It depends on the fuel used, and temperature of the engine parts, i.e. high temperature engine parts + gasoline is going to vaporize very quickly (and not wash down the bore) But as the engine parts are colder or alternative fuels may be used (injecting far more alcohol which tends to cool parts as it evaporates) the late injections can become problematic not just with cylinder washing but with vaporization/atomization.