diff --git a/src/dapi/http/XhrHttpImpl.js b/src/dapi/http/XhrHttpImpl.js
index 3ecfb57..04ac100 100644
--- a/src/dapi/http/XhrHttpImpl.js
+++ b/src/dapi/http/XhrHttpImpl.js
@@ -151,13 +151,16 @@ module.exports = Class( 'XhrHttpImpl' )
      * Determine whether the given HTTP status indicates a success or
      * failure
      *
+     * The default implementation is to consider any 2xx status code to be
+     * successful, as indicated by RFC 2616.
+     *
      * @param {number} status HTTP response status
      *
      * @return {bool} whether HTTP status represents a success
      */
     'virtual protected isSuccessful': function( status )
     {
-        return +status === 200;
+        return ( +status >= 200 ) && ( +status < 300 );
     }
 } );
 
diff --git a/test/dapi/http/XhrHttpImplTest.js b/test/dapi/http/XhrHttpImplTest.js
index 05daa6a..1256f1c 100644
--- a/test/dapi/http/XhrHttpImplTest.js
+++ b/test/dapi/http/XhrHttpImplTest.js
@@ -181,6 +181,22 @@ describe( 'XhrHttpImpl', function()
         } );
 
 
+        it( 'considers any 2xx status to be successful', function( done )
+        {
+            var StubXhr = createStubXhr();
+            StubXhr.prototype.status = 250;
+
+            Sut( StubXhr )
+                .requestData( 'http://foo', 'GET', '', function( err, _ )
+                {
+                    expect( err ).to.equal( null );
+                    done();
+                } );
+
+            StubXhr.inst.send( '' );
+        } );
+
+
         it( 'allows overriding notion of success/failure', function( done )
         {
             var chk = 12345;