Tweaked news section for Wave.

[SVN r33855]

index.htm

@@ -532,7 +532,7 @@
                               (macro tables et.al.).</li>
 
                               <li>The overall performance has been improved by upto 
-                              30-40%, depending on the concrete files to process. </li>
+                              40-60%, depending on the concrete files to process. </li>
 
                               <li>Support for new pragmas has been added allowing to control certain library features from inside the preprocessed sources (partial output redirection, control of generated whitespace and #line directives).<br />
                               </li>