I've run EMT through walls in commercial retail applications (metal studs...hole punch as needed....no big deal).
How difficult would it be to run EMT in a new stick built home ...assuming of course, that you have prints, can bend pipe, etc ...basically have a clue about running pipe....as compared to running NM or AC?
Time wise ....including pulling/splicing? More time, same, less?
Cost wise (material and competant labor)? More, less, same?
I can see where EMT would have it's advantages....but it all boils down to the numbers here.