diff -r fe532dccf8f6 Doc/library/timeit.rst
--- a/Doc/library/timeit.rst	Mon Apr 14 10:30:43 2014 -0400
+++ b/Doc/library/timeit.rst	Mon Apr 14 12:38:25 2014 -0400
@@ -63,6 +63,12 @@
    Create a :class:`Timer` instance with the given statement, *setup* code and
    *timer* function and run its :meth:`.timeit` method with *number* executions.
 
+   .. note::
+
+        Because :meth:`.timeit` is executing *stmt*, placing a return statement
+        in *stmt* will prevent :meth:`.timeit` from returning execution time.
+        It will instead return the data specified by your return statement.
+
 
 .. function:: repeat(stmt='pass', setup='pass', timer=<default timer>, repeat=3, number=1000000)