The twisty nature might have a lot to do with it. When the time is hard to make, and there are so many terrain changes and turns, the riders may not be slowing down sufficiently to negotiate these.
Normally I am a proponent of the optimum time being tight to keep things from being a dressage/SJ competition. But one can see in this scenario it’s not the same thing as a more open course.
Here is Boyd Martin’s take on the course, and eventing in general, in the days leading up to Pau:
Boyd’s familiarity with both horse and course should play in his favour this week, although he admits that the tight, twisty course “doesn’t really suit Crackers that well, because he’s a bit wild and hard to control, so I’m better off on a more straight, galloping, big fence course.”
But, he says, “I love riding here: I’ve ridden Remington here, and Crackers, and Welcome Shadow. It’s a different style of cross country riding — it’s like a go-kart track, and you need a brave, honest, quick-thinking horse. It probably doesn’t give you the best feel when you finish the course — you feel exhausted, and you’ve been pulling the horse around everywhere, but I’ve got to say, I think eventing’s going towards this. Narrows, corners, mounds, lumps and humps — we’d better get used to it.”
It’s awful that when I read this a few days ago, I was not happy; it was a damning statement about our sport. It still is.