If the goal is to raise tame budgies, an excellent way to accomplish that is to let the parents raise them, then take 10 minutes, several times a day, to hold the chicks. Start when their eyes open, about 7 to 10 days. Increase the time as they mature. You should have good results with this method. But it is my educated guess that these ones would probably have bit no matter how they were raised.
Personality plays a definite roll in taming.