I think that it depends on what you mean by "asynchrony" in this context.
Yes, I'd say that temporary areas of asynchrony may definitely occur in the NT population. But they tend to be transient and still well within the central 2 standard deviations from the mean.
So if child is at the 50th percentile for everything else, maybe is a bit klutzy for a period of 18 months or so starting kindergarten... that particular domain (large motor) might be at the 15th percentile for a while. So sure, there's an asynchronous gap, but it's not really diagnosable, it's not long-standing or persistent, and it's never extreme.
Does that explain it? I think it becomes "asynchrony" in the sense that we're used to using that term when the child in question has a really substantial gap in between developmental domains, no matter what those might be.
At that point, this is pretty much what it means to be "gifted" in the functional sense.
