Apple’s announcement of Mountain Lion breaks with the past in a few ways including by announcing with out a major Apple event. One of the other changes is the news the Apple is moving OS X to a yearly release cycle like iOS. That may be a great way to introduce new features for consumers, but it’s likely to create problems for organizations that have a large number of Macs.
Schools and colleges are still among the organizations that have large Mac populations and have always been a key market for Apple. A yearly release schedule stands to impact them more than any other type of organization and that impact isn’t likely to be a positive one.