Deferred response to populate HTML

In my Ember app, I have the following code which makes a HTTP call (internally Ember.RSVP.Promise) and returns HTML which is supposed to be populated on screen

getExternalResponse: function(args, sUrl) {
    var deferred =  this.doXhrPost(args,sUrl);
    return deferred;        
}

My question is would the above work i.e. will the HTML be populated (as I am using deferred). So I hope it would not wait or something. Also is it the correct way ?