OK, I think I get "long grain converted rice" here in the U.S. The directions on the package say 2:1, and all the slow cooker for rice reassurances on the web give the same water:rice ratio. See, for example, http://www.food.com/recipe/perfect-crock-pot-rice-16465. Or here http://www.livestrong.com/article/458453-how-to-cook-rice-in-a-slow-cooker/. That's fascinating that in China, the 1:1 ratio is standard.
I have the Rival crockpot cookbook, and what it actually says about rice is that if you're adding it to some other recipe, add the same amount of water with it. That's a little different than just cooking plain rice.
Yes, I absolutely agree that you can't necessarily trust things on the web, but there are loads of people who claim that you can prepare rice in a slow cooker. You can! It just doesn't come out very well, at least for me, and I'd like to understand why.