All the Vatican information I've seen relates specifically to the priesthood and I'd say that Fr. Bouchard knows this and is deliberately trying to blur the line between candidates for the priesthood and the remainder of the students in order to make his point.
It should also be pointed out that the apostolic visitation will examine a number of things, of which the homosexual question is only one, including course material, spiritual formation etc., and this will involve all the students at the institute.
Good emphasis - that is also very important.
Adding to the confusion could be the reporting itself. See this response from an earlier thread.