By "wide angle" I presume you mean something with a focal length under 40mm or so.
Yes. I think the three shots I've posted were taken at about a 35mm focal length.
If the second shot is nearly uncropped, to get that framing with a 40mm he'd have to have been shooting from about 0.5m.
Yes, that's right.
There isn't nearly enough prominance in the nose and mouth for this to have been taken at anywhere close to only 0.5m. I think his shooting distance was closer to 2m (6.6') than it was to 0.5m (1' 8"

(so 1.3m and up.). 1.8m still gives a lot of depth separation between nose and ears. This framing at 1.8m requires a focal length of about 135mm. At about 1.3m it requires 105mm.
I think he's working much closer to his subjects than you think.
I'd guess his working distance is between 60 and 120cm (2 to 4 ft), with focal lengths between 35mm and 85mm. These are intimate sessions.
To get those huge full frontal catchlights, the photographer needs to work with massive light modifiers very close to the subject, and he needs to squeeze himself into the space between the light and the subject. There is no space to use the very long lenses favoured by traditional headshot photographers.