Renamed config interfaces properly with Section suffix, re-implemented the For<T> UmbracoConfiguration method to retreive specific settings... might use this entirely instead of the nested access as it might make it easier to mock.

src/Umbraco.Core/Configuration/UmbracoConfigurationSection.cs

@@ -2,7 +2,9 @@
 
 namespace Umbraco.Core.Configuration
 {
-    
+    /// <summary>
+    /// Represents an Umbraco configuration section which can be used to pass to UmbracoConfiguration.For{T}
+    /// </summary>
     public interface IUmbracoConfigurationSection
     {
         
@@ -19,7 +21,7 @@ namespace Umbraco.Core.Configuration
     /// <para>The <c>UmbracoSettings.For{T}</c> method will return a section, either one that
     /// is in the configuration file, or a section that was created with default values.</para>
     /// </remarks>
-    public abstract class UmbracoConfigurationSection : ConfigurationSection
+    public abstract class UmbracoConfigurationSection : ConfigurationSection, IUmbracoConfigurationSection
     {
         /// <summary>
         /// Gets a value indicating whether the section actually is in the configuration file.