These experiments are not easy. Only now, with the report of new results from the Soudan2 experiment, has this become clearer. The answer to this is an important 'NO'. There is however no other hypothesis at this time. Further data is needed to show beyond reasonable doubt that neutrinos travelling short distances differ from those travelling long distances.
More data is needed.
If neutrinos do oscillate, they have to have mass, or at least one of them does. The consequences of these discoveries are not yet clear. An applet to demostrate oscillations between two types of neutrinos.