http://www.smogon.com/forums/showpost.php?p=3058405&postcount=1071That post isn't the same as a test. Btw, Bulbapedia's been wrong before. Information sources can be wrong, because people are human.
The only solid way to end this argument is to:
(A) Have serebii admit they're wrong and change the entry
(B) Test it ingame and prove them wrong
There's your test. Reckless remains a 20% boost.