I doubt it's that bad. However, some people wear their glasses very loose. I can look down and shake my head back and forth vigorously without mine falling off or even slipping down to the end of my nose. The only ride I worry about mine is RNRC, and it's only because I tend to hit the edge of them on the shoulder harness, which then pulls them off my face. I always wear a strap on it now. I bang my head a lot on RNRC, including the side of my face; that's why I only ride it once per trip.
As long as I can wear a strap, I'm fine. My biggest issue with Pony Express was that we didn't know we would need to do this. No signs anywhere or recordings. Didn't know until we were on the ride and buckled in. I guess we will just have to wait and see and hope for the best.