Yeah, definitely. I seem to remember mentioning lightmapdensity in there as well, but this needs to be added as evidence of it.
Btw, I guess those shots are of a single brush floor covering several rooms? This is one of the reasons I break up the work, creating a separate floor for each room, so the light map isn't extended along the floor past the walls . Sometimes lightmapdensity alone doesn't fix it entirely, but I'm glad it has in this instance!