Both of you are right... Kind of
liamh, your image is a HDR technique modified for a single image, and it was done very well. I like the exposure a lot, but elliot is correct in saying it is not a true HDR since it is from a single image. elliot is also right that there are many other ways to achieve the final result other than using this HDR technique modified, like with the shadow highlight tool to name one, however, as I said, I really like your image, but feel it should be called a mock-HDR, since HDR relies on multiple frames not multiple images from one frame.