Yes, with exception of corners, and other hard to reach places. Doing this particular floor I could actually see the results of the brush getting down in the grout lines.
Marty, you just go ahead and hand scrub the entire 2.600 feet of 1x1 inch grout lines. My guys will just scrub corners and under commodes and up one inch on tile coving.
We 're using 3 guys on these jobs. Once floor is sprayed 2 guys start scrubbing corners, under commodes & edges while one scrubs with 175. At about the 1/2 way point of 175 scrubbing one of the techs drops off and starts Turboing, when finished the 175 scrub guy takes supplies to next bathroom and starts all over. So simple even a "Pig Farmer" could do it!