cool work, would have liked it more if you had hosted it somewhere and provided a link here to try it out instantly.
Also, are you planning to show the items as actual cards instead of list items?
For iOS development you can use iSpeech Recognition, OpenEars, Nuance or CMU Sphinx for speech to text. We use iSpeech and it was really simple to integrate.
I'm a part of the team and lol, no - that's just Chadd's "demo voice". I think the feeling that the demo was sped up comes because we made those card transitions so fast. If you sign up, you can actually try the demo yourself to see that it really is that quick :-)