Hey Brendan.
Mt Bike bars now have a bend in them is because the trend now is to have a shorter lower straight stem and a bar with rise in it to give that more sit up position.
A longer stem with more rise and a flat bar will do the same thing but will look a bit old fashion.. It's also to get that motocross bike look.. (IMO)
Re.. the bendy paddle shaft thing.. I just noticed Nikki's bendy shaft paddle as she runs out of the water at the end of this vid.. I think it's the new Werner.
DJ