You seem to be focusing on the wrong point, first of all my sample of hands after the update is not what I am formulating my claim on, it only helps confirm what I had already calculated to be true based on other factors. The probability that the evbb winrates have actually decreased x% when you have empirical evidence they have increased x% becomes increasingly less probable the larger the value of x is. My ev winrate has been much higher after the changes to the Stars MTT structures than what I was winning at prior so I can say with a quite a lot of confidence that evbb winrates have gone up, not decreased. If you don't understand any of what I am saying I suggest you fiddle around with:
http://pokerdope.com/poker-variance-calculator/
and increase the observed winrate while decreasing the true winrate and look at the value for "Probability of running at or above observed win rate" and see how it begins to decrease as these numbers get further apart.