Some of those are true.
Definitely a big dog in a small body. Mine gets along well with other dogs. He comes when I call which is the only obedience I’ve required of him.
Mine minds instantaneously.
As in, he immediately does what I want, and then half-a-heartbeat later gets distracted and goes and does what he wants.
He’ll stay in the yard without a lead, if I call him back every 30-90 seconds.