Absolutely, so stable - he used to train with a bottle on his head to perfect keeping the head still - and so above the water.
Also worth noting in that video that he sets the 200m world record in spite of relatively short pushoffs, and in spite of being only 1.78m and 62kg (Lochte is 1.88m and 88kg). This guy is so technical to be able to survive among those backstroke giants. He's having a hard time with Lochte because Ryan takes a lot of margin with his long pushoffs and powerful uw dolphin (Phelps' school), but in the stroking 35m little Irie is slightly faster.
Let me know how it goes if you try that kick. I tried it for a while long ago, but with me it didn't make miracles :)