I'm a HS golf coach in Oregon, for a rural school, and my 2 best players don't spend more than half their time in the 70's, but I've seen schools like Lake Oswego shoot under 288 as a team a few times this year, that's under par for the team, and done it on some difficult courses. We had a young lady from Florence Oregon set an all time course record of 64 at a local country club a few weeks ago too. Most of these kids come from families who have been members of the local country club, and have been getting formal lessons for many years, and who have a the drive and interest to practice almost every day, even through the wet Oregon winters.