Not sure. All our dogs have been purebred, some from more careful breeders than others, 3 boys, 4 girls, 3 different breeds. From my very small sample, I'd say overall our girls have been more willing to please than the boys. The bullmastiff boys were pretty stubborn and maybe Chase just seems more stubborn because Lark is more biddable. All have had a couple rounds of obedience classes. Of my current 2, I probably spent more time with Chase's training since he was an "only child", we had just moved to another state right after we got him so I wasn't working, the kids were in college or working, so my high beams were pretty focused on him all the time. Lark caught on to training very quickly despite having Chase as a distraction/role model and me working. She continues to respond to commands more quickly than Chase and was always willing to try to learn new tricks that Chase would have nothing to do with, such as shake, roll over, spin, just little tricks like that.
I think a dog's personality probably plays into it a lot. I encountered one couple walking on the beach with their dog off leash and that dog practically had his nose touching the back of the man's swim suit at all times. They'd stop, he'd sit down, they started walking again, pup was back walking immediately behind them. I asked them how they had trained him to stay so close. They said he'd received no training whatsoever, he had just always been that way and they'd had him since he was a wee pup.
Circus animals, dolphin shows, that training is probably much different than what most house pets get. Their interactions with their trainers is probably all training, that's the trainer's full time job. The trainers don't spend time in the elephant enclosure cooking meals, working on computers, watching TV, sleeping. The interactions are episodic, time-limited, intense, focused, consistent, unlike how most of us spend time with our dawgs. On the other hand, how some house pets turn out so very obedient and others not so much may have more to do with the individual dog than where they came from.