Well, it turns out that the river was VERY low this weekend. It was below the gauge but I estimate a bit below 3. That made for a more intimidating gueule du lion. Out of around 15-20 people that came, only 6 paddled it. Same scenario for the group that went with the festival on Saturday morning.
Lesson: the more water the better for this rapid. Last year it was a blast at 16.