To begin with, I am not very trusting of people who are wanting to sell me something and that includes breeders. All of my birds came to me from individuals that didn't want their birds any longer and all of my birds had been abused before their arrival to my home, some of them for years, so I never really had to deal with breeders. Despite not having any first hand experience with breeders, I am a member of several bird forums and I am constantly reading about breeders that have misrepresented their birds
As you are probably aware of, birds are extremely fearful when they are first brought into a new environment with new humans. They also go through a period of mourning for that which they lost due to the change, even when it was a poor situation. This all give rise to the ' honeymoon' period where they are on their best behavior until they begin to adjust to the new environment.
I do find that short periods of time, several times a day to be useful in gaining and reinforcing trust in me from a new bird and even in birds that do trust me and have been with me a fairly long time. But I have learned that more often than not that long periods of time such as about one or two hours given in a couple of times per day to be much more effective in gaining their initial trust. This appears to be due to their highly social nature as well as that they are hardwired to never be alone from birth until death and as a baby they crave this reassurance as much as they need air. I sit with them as much as I can talking and singing and even just watching TV or listening to music( they all love music). They do need the sound of our voices but they also need just our physical presence and will start coming to the same side of their cage as we are on in due time as their curiosity and trust begin to grow and it is at this time that I start offering treats through the cage bars while talking to them. I never insist that they do anything and I don't even begin to ask them for anything until they show me that they are ready to try more. Doing otherwise is counterproductive as it can easily destroy all of the new trust in you that you have worked to gain faster than you can gain it from them.
I hope that this helps you. If you need more let me know.
I am sorry, I had to edit this post as I forgot to answer your question concerning time out of the cage and a couple of others.
I would never use food management on a bird this young and as a matter of fact I find that in a companion bird that this is not normally needed. Getting a bird to be motivated by food is simply a matter of using the right high value treat and timing your training sessions to those times when the bird is naturally the hungriest.
Towelling a bird is normally a very stressful thing for any bird and because of this I do not use it to force my will on the bird, I only use toweling in those instances where it is needed such as for a medical exam or if the bird is in danger unless I towel it to remove it from the danger. Neither of these occur on a frequent level, however you can reduce the stress that a bird experiences when they must be toweled through training, please read this
viewtopic.php?f=11&t=12970 I always try to give all of my birds time out of their cages each and every day as they need the exercise and they need to become more comfortable with their surroundings and you as well. In the beginning I let them out about an hour before their dinner time as if they don't return on their own or easily then it is easier to get them in when it gets dark than at any other time. They normally need at least 4 hours of time out of their cage with at least one hour of it being on you or with as much physical contact as they will accept at first.