> He hit the targets in 2 minutes, using 11 arrows. After further breakdowns and repair work, Adam and Jamie accomplished the feat with 15 arrows in 1 minute and 50 seconds.

Faster, sure, but not more accurate--10 seconds less but 4 more arrows. Faster itself is also debatable, depending on whether or not you factor in the breakdowns.

Breakdowns aren't relevant, as Mythbusters slapped it together over a few days, and are uncertain of the design. The Greeks had years to perfect it, and great knowledge and expertise building with these materials.

As another poster mentioned, the time comparison is unfair too.

In terms of accuracy, how many days or weeks did they spend learning the tool?