Apple updates WWDC app - most sessions are still TBA

Looking at the event schedule most of the sessions are still TBA (though Apple has given them humorous titles this year). Has Apple had that many TBA sessions in the past?
http://9to5mac.com/2014/05/21/wwdc-to-feature-women-in-technology-and-apps-for-china-events-as-most-sessions-remain-secret/
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