I like the concepts and his work in general, but I wasn't blown away by it. Great day (night!) job though!
"Any formal training in photography?
None at all."
It shows.
Whilst I like the concepts that he takes and the general composure, only one of those shots in the article were even close to horizontal and it was a little off-putting. Also, there are a few distractions and things that could easily be removed to improve the photo's even more.
Note: Having horizontal and vertical lines angled can add a sense of action to a photo, when they are not deliberate and only slightly off it can be off-putting and look a little un-professional. I have a similar problem when hand-holding but I think mine tilt right (rather than Drews which tilt left), lightroom and any other program can fix this very easily.
I commend Drew for his abilities and good decisions, but I think his photo's would go to another level if he had some training.
Yes, I do agree some of my pics are a bit tilted

The thing you have to realize is that all of this is hand-held, it's impossible to do any of these shots with even a monopod (and usually a fire hazard/illegal). So there will be some tilting, although most of the ones in the example pics are very slight so you won't notice unless you almost pixel peep and look carefully

As Dock said, they are more photojournalist pics, since in all the situations, there is no real posing or anything, just getting a quick pic or two, or even like the Aoki one, being pushed around in all directions while in a drunk crowd! I tend to keep the pics that way.
One thing to note is I never crop my pics at all, the only exception ever is that Motley Crue group shot, since I went a little too wide. Everything else I like to compose in camera. I never do any photoshopping either, so if something sticks out bad enough, i'll just get rid of the pic and retake it.
One thing to note is that all the way up until last August, all my pics were JPEGs SOOC. So I have only been doing more post recently, so I haven't tried any of the lightroom features yet for leveling/tilting photos...right now just filters and basic post. So eventually I will work on possibly fixing the tilting in post

One thing I don't really get is the training aspect. What exactly is necessary in doing that for me? I take pictures the way I want them to look, i'm pleased with what I do, others are pleased with what I do, and i'm continually improving. I don't want to go to a college class where rules for photography that don't apply to my genere are forced on me.