Pirates vs. Ninjas: Part 2

Mission:
Which faction will do the best job mowing the grass: Pirates or Ninjas? The job will be judged on quality and speed. The clock starts at sunrise.

How the Pirates Mow the Grass:

Sunrise: No activity
10:00am: A dozen pirates convene in the front lawn, argue for five minutes and then scatter accross the neighborhood. Five minutes later they return with a dozen nearby residents. Each of these neighbors has their own lawn mower and a few minor cuts and bruises. Due to threats of bodily harm, the neighbors begin to furiously mow the grass. The pirates drive them to mow as fast as they can. They miss a spot or two but another pirate/mower team spots it and cleans it up. The cat-o-nine-tails is employed when mistakes occur, and few make a second mistake. The positioning of the mowers across the lawn isn't perfectly dispersed but it's close. The pace is frantic.
10:16am: Every blade of grass has been cut. The lawn is done.


How the Ninjas Mow the Grass:

Sunrise: No activity
10:00am: No activity
12:00pm: No activity
6:00pm: No activity
Nightfall...
At this point it was agreed upon that the Ninjas had elected not to participate in this competition, and we eventually went to bed.
...
However...despite never hearing a lawnmower, or even hearing the neighbor's dog bark, we found the lawn to be cut and groomed the next morning.


Analysis:
The pirates were clearly very fast. Their lines were not real straight and there were some places where the grass was uneven due to differing blade heights, but it didn't look horrible.

To properly analyze the Ninja's work, a botanical forensics specialist was brought in, and he estimated that the grass was systematically cut between 8:00am and 7:30pm. The disturbing thing is that we were alert and expecting to see the Ninjas begin their work. We simply overlooked the fact that the lawn was gradually being completed throughout the day. The Ninjas methods are a complete mystery. They did a very good job and deserve style points, but speed was a part of this contest, and the Ninjas took at least 9 hours and 14 minutes longer to get the job done. The higher level of quality was not enough to make up for the disparity in speed. Pirates win!