it is a art, parkour is never competitive, it is the art of movement, and everyone style is effected by there personality, the kinda environment they grew up and and there experiences. Which if you look at song writers and musicians there music is influenced by the same things.
Art is anything you can express yourself in, thus I see this as an art. If the person participating desires it to be as such.
I believe the definition of Parkour is to get from A to B in the most creative way possible.
Its still art, sport competes, parkour is a movement, we don't compete, we go our way
then how about those RED BULL competitions? and this guy was there too..t is a art, parkour is never competitive