The animation on the page looks an awful lot like autoregressive inference in that virtually all of the tokens are predicted in order? But I guess it doesn't have to do that in the general case?
Anyway, I think we'd expect it to usually be more-or-less left-to-right -- We usually decide what to write or speak left-to-right, too, and we don't seem to suffer much for it.
(Unrelated: it's funny that the example generated code has a variable "my array" with a space in it.)