Surely you realize that there are countless Photoshop experts the world over, and that some of them explore similar concepts. It's rather "blatant" of you to make this accusation when he clearly is using different image examples, and has created his own graphics to demonstrate every aspect of the process he describes.
How many articles do you supposed there are to explain the use of layers? Did they all steal each other's stuff?
The original story appeared on Digg last month. It got 3180 diggs and a huge discussion thread on the technique. It was one of the most popular Photoshop technique articles ever to appear on Digg.
Then, a few weeks later, Wayne's article describing the exact same technique also appears on Digg. Not a generic topic like layers, but the same technique used to achieve the same effect in the same way as the original article.
Wayne says he didn't see the first article, despite it's extremely high profile in a web community he clearly moves in. Fair enough, coincidences happen.