well the only times i’ve been over it the SPD riders were slower and crashed more.
Its the kind of rocky that sapps your speed unless your going fast enough to hover over the top of it, and the SPD riders just seemed to get upto speed, then stack. whereas the riders on flats could dab, put in couple of crank turns and be up to speed again.
That and the flat riders seemed to have the confidence to ride faster (almost exponentialy, once you sped up it was easy, so you went even faster) knowing they could dab even if they didnt, the SPD brigade ended up unclipping and ballancing on the pedals, resulting in even more spills!