No. They even brought up Spock and Evil Goatee Spock to mention that twins defeat it.
(I say "defeat". Schiller just said the chances of a false positive were higher with twins than the 1/1,000,000 base rate [compared with his claim of 1/50,000 for TouchID])
This was explicitly brought up by the presenter (though through the premise of an "evil twin" and a photo of Spock from Mirror, Mirror) and they said you should consider a password.
Twins shouldn't be a problem. Even the ghetto facial recognition implementation in the AliPay app (a Chinese PayPal clone) can tell twins apart. Surely Apple can do an even better job.
(I say "defeat". Schiller just said the chances of a false positive were higher with twins than the 1/1,000,000 base rate [compared with his claim of 1/50,000 for TouchID])