Err, what else are they going to do, they are based on the IOM?. If their aircraft aren't contaminated, then of course they are going to operate. I think EZY were scared of getting an Airbus stuck here today with the potential for snow and no de-icing rig.
Our 'famous' 'Apprentice' contestant, Staurt Baggs, got bumped off the Ezy Gatwick flight today, and allegedly was told by Easyjet (according to his page on facebook) that Ronaldsway was closed because the man who grits the runway is stuck off Island too!. I can see how 'the de-icer isn't going to be there til tomorrow' could be construed as that - just.