In the "Pearls of Wisdom" section of LOST Magazine #10, Damon confirms that Desmond did travel in time back to 1996. Just thought I'd share.
So, be it in a consciousness, physical, or in whatever way, did Desmond travel through time back to 1996 in that episode? (Paul Williams)
Paul. While traditionally, "simple" questions do not comprise of over a 100 words, I am gonna give you a wonderfully simple answer... Yes!!! (Damon Lindelof)