[Liesje]

Well, yes, every piece of it effects how well the dog turns and moves. But remember there is more to it than just rear angulation. A lot of the WGSL dogs *don't* have the extreme rears of the American show lines but they have extremely steep croups which gives them the "banana back" look (curved back that just sort of drops off).

In general, the rear angulation needs to match the front for the dog to move well. How much angulation there should be depends on preference, but if it doesn't match it doesn't matter how much or how little you prefer the dog will not move with balance.