According to the club they have this local rule, because it actually speeds things up. However, I can neither confirm nor deny that, because every time I played there I had no one in front of me. The place is remote.
These are holes 14 and 15. If you look at the fairway of hole 15, you'll see that it is wide, but there is OBB left and right. So you know right away whether your ball is in play or you have to reload immediately.
This configuration asks you to make your decision on tee #15 without perfect knowledge of the outcome of hole #14. It makes it more of a gambling situation, which I personally find interesting. Also, if your opponent hit a bad tee shot on #15, you might decide to play the rest of #14 differently! Believe me, you can three-putt these greens. Like it or not, it certainly adds a whole new dimension to the game. They also had to get a special exception for match play, because it means that whoever has the honor on #14 automatically has it on #15.
FWIW, this course is so wild that playing it with a set gameplan is futile anyway. You'll have to react creatively to what it throws at you. If you don't like Painswick et. al. you'll hate it of course
Ulrich