Ds is potty learning right now--but I would NOT say we are training him. When he turned 18 months, I bought him a potty. Frankly, his little butt was too little for it then anyway, so I could not expect him to like it. But, we put it in the bathroom, and I let him hang out with me or follow me in whenever I go. This did not lead to much use of the potty chair, except on mornings when my mother would come over, rip him from our bed, pull off his dipe and place him on the pot--when of course he would pee, I think half out of fear.
Fast forward 6-7 months. It's summer. Ds is almost always bottomless, if not topless too, and with nothing on, he is a master of the potty. I put trainers on him, and forget it--they are too hard for us to get down on time. Velcro AIOs he can handle, but if he is busy, forget it. He spends a couple days a week at my sister's, where there are older kids using the potty. Unfortunately, this has led to his wanting to pee standing up. I figure, once it colls down again, we'll be using a lot more dipes again, and when new baby comes in winter, we'll probably regress. I don't expect him to have it down until NEXT summer--when he'll be 3. He may surprise me, and that would be fine, but I am not expecting it.
Most people no longer use a lot of "tactics" with potty learning. However, ECers have a lot of success with even the smallest of babies. Of course, they have accidents too. I think part of the problem is that we get this idea of having a perfectly trained little one who uses the bathroom every time by a certain age, and then we feel like we have failed.
Oatmeal, you're not going to stunt your baby.
I am sure she is just great, and as she grows more verbal (this is one thing the books tell you a child should have is effective communication) you'll see her move toward the potty. But, at the same time, no harm in going out and getting her one.