Well, lateral flight plan adherence in spain is pretty much 100%. Since they are too afraid to give directs and do not know how to do that in the first place of course lateral adherence is great. Vertical adherence however is very very low indeed because they are not flexible enough anymore to clear one up according to flight plan while changing the lateral path to accomodate that. Means that flying through spain costs quite a lot more fuel than calculated, several millions worth of fuel per year which is equally bad for the environment and of course the airlines.