Asking for clarification on dataType: "json". In an example I created at http://dojo.telerik.com/AQEpe, when I run the code the debugger will display only one call to the customers api if I just list the URL in the transport read section. But when I add dataType: "json" as a property below the url and run the code the datasource will be retrieved twice now as shown in the debugger.
The Callback1.png displays the first method with no dataType and only one call to the api. Callback2.png displays the second method described with a datatype and two calls to the api.
Should I not include dataType: "json" in my code for shared calls? Is including dataType necessary at all? I am trying to limit the calls to the database and in my application the filters similar to the example are creating duplicate calls slowing the page.