??? Sorry, I'm not sure I'm quite following you.
It would be illogical to expect to observe anything without affecting it. Its just that in our everyday measurements the uncertainty gets buried in the everpresent noise.
It's more than that -- it's that the magnitude of the uncertainty is also much smaller (Planck's constant) than the quantity being measured. Even with much higher precision, the error introduced is insignificant in such cases.
There is likely to be a systematic bias in the way that they gathered their statistical data, of which they are unaware.