I consider stud like behavior flirting with and courting mares, dropping for the mare, and attempting to mount a mare. Anything less than that I would consider a different behavior problem.
Several of my cut late OTTBs would do all of above; my current QH gelding was not cut late, and is the world's sweetest gelding and very well behaved, however, when I attempted to turn a mare out with him briefly, he had an unseemly interest in her, chased the other gelding away from her, and dropped and attempted to mount her. I moved the mare to the other paddock and he forgot about her.
So, since you describe the behavior as "herd bound and disrespectful", I doubt the issue is cut late, proud cut or cryptorchidism (undescended testicle).
Can you give us some more details about the behavior?