Joel, thanks. I do try to keep things in perspective, at least at times. That's why the race will go in my training log with a note that I was 12th out of 607. However, you don't accomplish aggressive goals by thinking how much faster than most people you already are. You accomplish aggressive goals by focusing on those 11 people (in this case) who beat you.
For now, I'll look back and use those 11 people ahead of me as motivation to push myself to a higher level. Who knows, though? Maybe 20 or 40 years from now, I'll look back and say beating nearly 600 people was pretty darn impressive for a guy who felt like he wasn't in good racing shape.