Just to clarify - my comments on certain schools offering 2-3 times the number of places is informed by a quick look at offers / acceptances for some preps in the area ... very rough calculation as always difficult to know how that would evolve over time. Also, some offers might have been from waiting list.
As said above, it must be difficult for schools to calculate, especially as people apply to more schools ... I personally think that this year schools might be more cautious and be more conservative on offers initially but end up dipping into waiting list more / earlier than other years.
But the thought to hold onto is that every school will offer a multiple of the number of places.