I was annoyed when I saw some video of some high school kid winning the 2 mile state championship in illinois a couple years ago throw his arms up like he's all that.
on the other hand, when chris solinsky breaks the 10K AR, or when someone wins a marathon, it's totally called for, and the audience even expects it. even if it's a smaller marathon.
i'm not sure exactly why i think it's okay in one case and douchebagging in another. where is the line to draw?