docs(router): clarify router redirect and link to Victor's blog post

public/docs/ts/latest/guide/router.jade

@@ -978,22 +978,33 @@ code-example(format="").
   We prefer that the application display the list of crises as it would if the user clicked the "Crisis Center" link or pasted `localhost:3000/crisis-center/` into the address bar.
   This is our intended default route.
 
-  The preferred solution is to add a `redirect` route that transparently translates from the initial URL (`''`) to the preferred default path (`/crisis-center`):
+  The preferred solution is to add a `redirect` route that transparently translates from the initial relative URL (`''`) 
+  to the desired default path (`/crisis-center`):
 +makeExample('router/ts/app/crisis-center/crisis-center.routes.2.ts', 'redirect', 'app/crisis-center/crisis-center.routes.ts (redirect route)' )(format='.')
 
 :marked
   A redirect route requires a `pathMatch` property to tell the router how to match a URL to the path of a route.
-  In this app, the router should select the route to `CrisisCenterComponent` when the *entire URL* matches `''`,
+  In this app, the router should select the route to the `CrisisListComponent` when the *entire URL* matches `''`,
   so we set the `pathMatch` value to `'full'`.
 
 .l-sub-section
   :marked
-    The other possible `pathMatch` value is `'prefix'` which tells the router 
-    to match the redirect route to _any_ URL that _begins_ with the redirect route's _prefix_ path.
+    Technically, `pathMatch = 'full'` results in a route hit when the *remaining*, unmatched segments of the URL match `''`. 
+    In our example, the redirect is at the top level of the route configuration tree so the *remaining* URL and the *entire* URL
+    are the same thing.
 
-    That's not what we want in our use case. The `''` prefix path matches _every_ URL.
-    We should redirect to the `CrisisCenterComponent` _only_ when the _entire_ url is  `''` 
-    (or the equivalent `'/'`).
+    The other possible `pathMatch` value is `'prefix'` which tells the router 
+    to match the redirect route when the *remaining* URL ***begins*** with the redirect route's _prefix_ path.
+    
+    That's not what we want to do here. If the `pathMatch` value were `'prefix'`, 
+    _every_ URL would match `''`. 
+    We could never navigate to `/crisis-center/1` because the redirect route would match first and 
+    send us to the `CrisisListComponent`.
+    
+    We should redirect to the `CrisisListComponent` _only_ when the _entire (remaining)_ url is  `''`.
+
+    Learn more in Victor Savkin's blog 
+    [post on redirects](http://victorsavkin.com/post/146722301646/angular-router-empty-paths-componentless-routes).
 
     We'll discuss redirects in more detail in a future update to this chapter.