no tilt, this is truly holding the pistol horizontally. I don't know if he is claiming htat these are SAS techniques. He is saying that he was with the 22nd SAS and he has been hired to teach these fabulous innovations to a local PD.
We shoot tilted from the holster at close to contact distance, an extension of a "punch" towards the target. Also when moving away from the target and shooting back (as in when pushing an innocent/client away from the threat). Other than that (and the G-18) I haven't seen a tilt hold to be very much of an advantage or more stable anywhere.