Hello Thomas,
The fact that the ScriptReferences are added to the RadScriptManager when you initially create a Telerik website/page or application is intended behavior. Please take a look at the following help article for more detailed information on why you need to use the RadScriptManager:
http://www.telerik.com/help/aspnet-ajax/scriptmanager.html
Considering the jQuery intellisense you should be able to use it no matter if you have a master/content scenario or a simple web page. As long as you have registered the scripts correctly (as explained
here and in the article that you pointed out) there should not be any issue with the intellisense (see the attached images).
Greetings,
Kate
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their
blog feed now.