I've been working with Backbone intensively since V0.1, and though I've very scarcely looked at ember, I've been following the heated discussions on both sides. Personally, I think it's damaging to both your publicizing efforts.

Perhaps what would be more beneficial is a more complex hello world app than the todo list. One that expresses the flexibility of Backbone's minimalism, along with the larger out-of-the-box functionality of Ember. I'm personally in the Backbone camp, but it would be easier to let the user decide what is best for him/her.