mmm- interesting. I'd say there's definitely a pattern and it's more than just a coincidence. Now, whether this happened because of a) unconscious choices made by the artists, b) a deliberate marketing scheme, or c) the fact that marketing people tend to copy each other (ever notice when a popular movie coins a tagline in its trailer like "nothing you've ever seen, nothing you've ever experienced, can prepare you for....", suddenly fifty movies start using it?).... I can't say.