I got to do a straight comparison on the Soul, 07 Revelations with QR vs 09 Revelations with maxle. Same wheels too. There's a wee bit of difference but I was only aware of it for about 2 or 3 rides… I went back to the QR ones as they were a nicer colour, which probably tells you all you need to know about how knocked out I was by the extra stiffness.
It depends though, flexier forks seem to benefit more. Even those QR Revs are decently solid for a trail fork. The latest revs are actually a wee bit flexier and seem to have been designed with maxle in mind, the older ones always feel like it's a QR fork with a maxle wedged on.
PJM1974 – Member
"I remember my first ride on Pikes"
Pikes would be stiff with a QR, that's why they weigh as much as they do.