In fact we’ve been tracking St Andrews offers here:
But probably the best resource is this tracking spreadsheet courtesy of The Student Room:
High level, the first offers started coming on 11/2, and they were all August or September apps (so more than a month old).
On 11/6 there were more offers, still late September, so still over a month.
But now there are a couple more offers from 11/7 and 11/10, both 10/12 applications, so that is down to under a month.
That said, presumably they were hit with a flood when the Oxbridge applications were due on 10/16. And also last year there were some people who got offers well after a month, as in months plural.
So no guarantees, but it is possible more of the October applicants will see decisions in the next couple weeks.