The major flaw will be most likely found in how the the time of departure and time of arrival of the neutrinos were determined. The OPERA team compared distribution of neutrinos as in the attachment, and not individual neutrinos. Two distributions are illustrated in the picture. You can see that determining ti = time of departure and tf = time of arrival is a tricky guessing game.
![[Image: FTL-neutrinographoftimeinterval.jpg]](https://images.weserv.nl/?url=i243.photobucket.com%2Falbums%2Fff277%2Fjosephpalazzo%2FFTL-neutrinographoftimeinterval.jpg)