Yes, the glycemic index was invented in Canada, so we have to be proud of the Canadian researchers who invented it, David Jenkins and his team, and Tom Wolever.
I think the issue in the field with the glycemic index, as good as it may be, is an issue of using it. As mentioned, this is hard, because we don't have this information. At the end of the day, if you consume whole-grain products, you're leaning towards low glycemic index products. If you consume vegetables, you're leaning towards low glycemic index products. If you look at the Mediterranean diet and at the DASH diet, they generally have a low glycemic index, so it's another way to look at a healthy diet.
It's extremely useful, I think, for the management of type 2 diabetes, but from a practical perspective, since we don't have this information, it's really hard for the public to use it if we don't have the information on a product.
We could argue whether it's a good strategy from a public health perspective. We understand a lot about food because of this discovery, but from a public health perspective, are we ready to change the whole landscape of labelling and so on to provide information on this? For me, that's a big question.