Maybe I'm too particular, but I see 3 things in the picture that could be improved upon.
1. The squinting is not required for good pistol marksmanship.
2. Ear protection is inadequate, even for a .22 cal. revovler.
3. I call this the RCMP grip. A while ago there was a picture in the local paper with two of our finests holding a suspect at gun point using their S&W semi-autos. I cringed at the thought of the slide cutting into their support hand. When I mentioned this to a local member he said that's what they teach the recruits in Regina. Not a good technique IMHO. Besides there is almost no support gained trom that thumb. Support comes from the base of the thumb pressed into the grip.