Ah, but who needs obedience when you can 
LURE COURSE!!!
Excellent points.
Ibizans are ranked low on the "dog intelligence" scale because of their alleged "untrainability".
They are by no means "dumb"; in fact, they're far too smart for their own good.
They were bred to hunt down, kill and retrieve prey -independently- of their handlers and "subservience/obedience" in their case, would be detrimental to their performance as independent hunters.
There are those who've been obedience trained but in general, they're too quick-minded and they become easily bored with the repetition of obedience training.
I'd bet you have experience with dogs who have been 'a step ahead of you' all the time and know the aggravation of trying to train such a critter....;))
One of my Dobermans was like that.
He'd picked up my body language *too* well and I never could get the voice commands out quick enough.
He'd do what I was getting ready to tell him to do before I even got a chance....LOL!
[or the dog was a mind-reader]..;)
Ah, but who needs obedience when you can
LURE COURSE!!!