The emulator no. The apps by default, yes. (if the debugger is attached)
If you look in App.xaml.cs you'll find this code in the autogenerated constructor:
// Show graphics profiling information while debugging.
if (System.Diagnostics.Debugger.IsAttached)
{
// Display the current frame rate counters.
Application.Current.Host.Settings.EnableFrameRateCounter = true;
// Show the areas of the app that are being redrawn in each frame.
//Application.Current.Host.Settings.EnableRedrawRegions = true;
// Enable non-production analysis visualization mode,
// which shows areas of a page that are being GPU accelerated with a colored overlay.
//Application.Current.Host.Settings.EnableCacheVisualization = true;
}
you can comment out the enableframeratecounter if you want it off, or you can uncomment those others to get more stuff.