Guys - I've run a profile on an app where we're only using your GridView, and are completely overriding your styles (based on your metro themes, bringing it back even more) and have noticed thousands of ResourceDictionaries instantiated which identify as internal to your DLLs - are you using hard-coded references, and do you have some form of resourcedictionary caching I might be missing? dll versions are 2013.1.220.40
Cheers,
AC
Cheers,
AC