Just as an update, the offers recorded on the St Andrews spreadsheet continue to trickle in (obviously these are just a small sample), and they still mostly seem to be around a month after application date, plus or minus a few days.
But I should probably note my understanding is international applications are reviewed by the international admissions officers in coordination with the individual school admissions officers. So I am not at all sure we can expect every school to be on the same sort of schedule. No one seems to be churning out offers much faster than expected, but possibly some schools will be significantly slower than others.
Indeed, it could be just a fluke, but it looks like quite a few of the recent offers came out of the School of Geography and Sustainable Development. Not all, but enough that I do wonder if that is a relatively fast school, and that others might be slower.