I've had brand new Moog ball joints go bad in a few hundred miles and fall apart in my hands brand new out of the box, so you have to check them. This will also result in the symptom you are describing.
Jack the front end up and using a long pry bar, lift up on the tire from below. A 2x4 used as a fulcrum to lift the tire up with the pry bar will tell you if they are bad. There will be a noticable freeplay in the ball joint. It should hardly have any freeplay if they are new. There is a spec for the amount of freeplay, but I don't have it handy.
You will need to put a wrench on all the hardware of the front suspension to verify if its actually tight. You can't tell by looking at it. I've had upper control arm bushings loosen up in a few days.