As for the "high kick", I seem to recall it is a modern misconception that this was already prevalent in 19th-century cancan dancing. While I admit that those miniatures are rather tame, if not sedate, I think that originally, the leg lifted straight either up to hip height, or upwards towards the torso in an angled pose. I might be mistaken, of course, and will happily accept being corrected, but from what I remember the "modern" cancan only came about after the turn of the century ("la belle epoque").