>When there is no ORDER BY clause, the GROUP BY clause seems to cause the records to be
>returned ordered by the group column.
>
>I don't see this in the docs. Is this the correct behaviour?

Yes because VFP implement GROUP BY with a ORDER BY loop.

Then:

with  GROUP BY <x><y> ORDER BY <x>

you can remove ORDER BY and to save some ms.

Despite someone says that this is not documented,
I don't believe someone succeeds in finding an against example.