My experience has been the same, not especially windy, when I have been through there on dozens of dayhikes over the past 20 years. I do recall a friend telling me that he had stayed overnight there during a monsoon storm and thought he was going to die…lightning was striking all around him all night long. It’s exposed and fairly high up, so I probably wouldn’t stay there during an electrical storm. Other than that, you probably just happened to catch a changing weather pattern that made it windy at the time.
z