diff -r 2445b0e2b4c9 -r 866cd7ef834e Lib/threading.py
--- a/Lib/threading.py	Tue Mar 19 14:16:04 2013 -0700
+++ b/Lib/threading.py	Wed Mar 20 22:48:30 2013 -0700
@@ -416,5 +416,8 @@
         try:
             if not self.__flag:
                 self.__cond.wait(timeout)
+            # Issue 2005: Since CPython 2.7, threading.Event.wait(timeout) returns boolean.
+            # The function should return False if timeout is reached before the event is set.
+            return self.__flag
         finally:
             self.__cond.release()