What is not mentioned in the excerpt is the fact that this is only a par 70 course, which makes it easier to shoot 59. .....Still, 11 under par on any 18 hole course is to be admired.
Usually par 70 courses are more difficult to score on than par 72 courses. If there are only two par 5s, then the chance for eagles is limited. I know Snedeker holed out for eagle on a 4, but that doesn’t happen very often.