Porco: that feeling passes pretty quickly, once you do some races with some pros. Even if you have that kind of talent, it takes years before you can work up to that level of proficiency.
The first thing you have to get used to as a beginner triathlete is the face that there are girls who can wipe the floor with you. Hell, Natascha Badmann and Desiree Ficker have dropped tour de france riders on the bike at ironman races before, so its nothing to be ashamed of. Just hard to accept at first.
You start out competing with yourself. Trying to improve your splits from race to race. Trying to improve your performance by doing multiple races at the same venue. Then, after a few years, if you're good, you'll see the same people finishing in the top 20-30 at every race, and you'll maybe start gunning for them.
It is going to be different from place to place, but in a triathlon mecca like Texas, you've got top pros at every race. California, Colorado, etc. will be the same way. I'm talking about former college cross-country or swimming all-americans and people along those lines. So dominating right off the bat is going to be impossible.
If you're really talented, you could place within your age group once or twice.