Yes... I think it is real but it reflects on people differently. I think that people that have it are ether hyper or hypo which means ether they are actively excited or they are calm.
I think people have it more then what is diagnosed and I also think that there is a way that people can cope with SPD without medication.
I really appreciated reading that sensory processing deficits can be inconsistent; meaning, present one day and not the next. That is absolutely my experience