I haven't noticed anything posture-related yet, I'm not sure how fast I can expect results. It's like Harpoon said, it's awkward to walk with good posture as it requires lots of focus.
The wrong stretches could be counter productive.
How do you know you're doing the wrong stretches?
Also another question: how do you know your glutes are properly firing when doing the prescribed exercises (especially snatch grip deadlift and front squat) ?
With stretches, I meant he needed to be more specific with what stretches he was doing and why he thought he needed them. I was trying to extract more information really. Personally, I think people will often include something just because they read somewhere its a good idea.
The purpose of the program as far as I see it is this, you do it to the letter and the resulting DOMS teaches you what muscles do what and when they fired, what that feels like.
As far as how long untill I see results, well, you have to be realistic, you may see a real difference after 6 weeks like me or it may take longer. You just need to suck it up and see it through if you really want the results.