There are ways around that.

One of the easy ways is to simply in-line your JSON model when you generate the initial page.

So essentially your webpage contains the html structure you need, followed by something like

    <script>
        Myapp.start( { tasks: [ { id: 1, title: 'do something' } ]) 

    </script>

So essentially you bootstrap your application in order to avoid a large AJAX call right off the bat.