Your boy is very handsome. What a cutie!
First of all I think he is too young to be worried about his ears. You may make things worse.
I can't agree with this method at all. That must be very painful having his hair pulled like that for days. When I don't put my own hair in a pony tail right, not only is it painful having the hair pulled, but the entire scalp in that area becomes very sore and painful.
My showline male is huge. I started taping his ears at 5.5 months and they were up within two weeks but they were weak and wobbly until he was around 10 months of age.
I used to have a massive boned, long coated female with a huge head and heavy ear leather. Her ears did not come up until she was seven months old, on their own.
Personally, I would not use this method at all. I am not sure why your breeder approves of it.