djdice, if you read my post carefully #4 says it is based on the operator. Most of the "professionals" are in it for the $$$ and they go for speed. The best manicured lawns are cut more than once a week, and then you can go as fast as you want, but it still takes an experienced operator, with a well prepared unit to get the bet job. I'll put my 38" mulching deck on my 16hp tractor against any machine and make it look professional, but it will take me longer, even longer yet if you want it stripped, which is very tough for a zero turn.