UPDATE (10 dec 11); There is a more correct (and exact answer now after fixing some earlier error analysis I had done which influences the values given in this article but not the ideas, That article is: Bad news for OPERA, that article does not have tight values given although the underlying calculations are very very stringent and accurate, the calculations haven’t been updated yet)
This logic is somewhat of a speculation, but you can see this as a number game, other articles are very stringent about what they see and what QM says they must see, I will upload a nice diagram in the other article as this one I intend as a mental exercise.
Quantum Mechanics says no matter what OPERA must see a 2.21 km/s error {that is at a 0.312 eV error, below which they can not go as per QM} But their paper says they have a speed error of ( 7.5+/-1.23 ) km/s SO how can anyone believe these results unless the 7.5 itself is an error. If I add these two in quadrature I see 7.6 km/s which is what I get if they make 1.15 eV error which is a 10% error on 11.5 eV. If one tunes the GPS time precision from 1 ns to 10 ns one reduces the energy errors to 10%. That means If OPERA has an initial error on some of their variables as 11.5 eV and it tunes its GPS precision to reduce the energy error it reaches 1.15 eV error but loses time from 1 ns to 10 ns error. One does not always reduce to 10%, but somewhat smaller to somewhat larger. If they can reduce their 7.5 by 16.4% they have an error of 1.23 kms but their times erros blows from original value to 6.1 times higher error. So I think the value they are giving is actually consistent with zero and these values are actually errors on a zero difference from speed of light.