I think you are correct in this. I’ve played an annual mountaintop concert for several consecutive years. In 2006 and 2007, thunderstorms approached during my set with very visible lightning (closing the event early in both cases) that reached a peak during a Lowebow solo piece. From both years, I had numerous comments stating that I’d done a great job of synchronizing my solo with the lightning. Since we all know this is impossible, it’s clear that the tendency you mention was in effect.
I was in a instrumental
band that always played with video projections behind us. We could never
see them at all (too close to the screen, too busy playing) and they were
always randomly thrown up there by the video operator (three super-8 projectors,
two slide projectors, lots of found images and film spliced together), and
after every gig people would come up and ask how we synchronized the video and
music so well.