One thing: The 500D came out a year after I developed and popularized the method. But also there are tens of millions of active photographers out there. My very first post on it on my old (now erased Amazon.com blog) was “I know I can’t be the first person to have done this,” even after a month of asking everyone on Flickr to see if anyone had seen anything like this before (they hadn’t.)
So I made sure I was the first to really work on making it systematic, trying it with lighting, with flash, trying candids, etc. Nothing is really new under the sun, but we can all try to poke at the edges of the envelope a bit.
UPDATE: Ah, I misunderstood around the edges due to language issues but I think I managed to answer a question in the process even though none was posed, haha. Interestingly random forest undergrowth was some of the first stuff I tested on too.