While I agree it is disappointing, I can understand Apples reasoning for not putting it on the iPad 3. It would not work well on the wifi only devices, as Siri needs constant connection.
Hi Pego...I am going to refer you to this existing thread regarding Siri...http://www.ipadforums.net/ipad-3-forum/66702-voiceso-dictation-not-siri.html
We will go ahead a close this thread.
Thank you for your understanding!