I can only speak for myself, but no, I've got no statistics.
I wouldn't have suspected there could be such a problem, so I haven't especially been looking out for it. Even so, the tendency in my games has been obvious at times (several games in a row).
Now I learn that at least three other people have observed the exact same phenomenon. Sounds to me like it might be worth an investigation.
(esconder) Alguns torneios atribuem um prémio, como uma inscrição paga ou uma certa quantidade de Brains ao vencedor do torneio. (JackAwesome) (mostrar todas as dicas)