cannonfodder wrote:A little note on frothing, the froth is created by proteins and the bubbles are kept small (aside properly steaming) by fat. That is why higher fat content milk tends to produce a smaller, silkier texture and low fat milk likes to create big stiff bubbles. If soy milk does not want to foam, you could try adding a little protein powder to it. Never having used it (soy milk), I know nothing of it.
I am having very good results stretching soymilk. My comment was to point out that it is more difficult to work because it seems to be more sensitive to injections of air that can quickly create large bubbles and it seems to have a narrower margin of temperature range for good results. Just a little too hot and it creates too much stiff foam which is not good for pouring latte art. I need to get a better pitcher for pouring latte art, but if you read my "How To" on stretching milk and latte art you will see one of my early attempts:

It's pretty ugly, but part of that is my pitcher which has a little beak of a spout and pours really fast with poor control.
And as far as the comments on soymilk, there are people who drink it because of lactose intolerance, other diary-food allergic reactions, and the production of mucous that dairy products cause.