Slab
Occasional Tour Caddy
If you have 7 minute intervals, that's about 9 groups per hour.
If you have 10 minute intervals, that's about 6 groups per hour.
3 groups less per hour from 7am till 6pm is a significant drop in the number of competitors.
So about 100 golfers won't get a tee time.
What have I missed?
I think it suggests they can get more tee times at 7mins, but due to round duration a very similar number of groups will actually complete the round in daylight if they'd used 10 min spacing