Nonsense! I started "training" my son when he was about 19 months old. I put that in quotation marks because I didn't start hard-core training until just after he turned 2, but I did buy him a potty and let him sit on it (clothed or not, according to his desire) and try using it whenever he showed interest, which -- in our case -- was frequent. Right after his 2nd birthday I actually started spending time diligently training him. I'd time the potty visits and ask him to at least try to go in regular time intervals. He did really well for a while. Once he started to regress, I used a "Potty Watch" my sister loaned me, and it worked wonders! It has a timer you can set for 30, 60, or 90 minutes, and when the music goes off your child knows it's time to try and use the potty.
In short, my son was fully trained -- FULLY! (well, except at night) -- by 27 months of age. He will be 3 in Dec. and already even wants to wipe himself, empties his own little potty into the toilet, flushes, and washes his hands with soap completely on his own. (I still help because I know it's not always done perfectly, but the point is that he's independent.) The only part we still have to tackle is staying dry at night, but that's minor. We use pull-ups, which are dry about 1/2 the time in the morning.
Good luck! It's definitely not too early. :-)