The malus rootstock Budagovsky 118 is a very precocious bearing, winter hardy rootstock that produces a tree 80% to 85% size of a standard. Production usually starts by 3rd leaf, but is advised to remove all fruit to allow the support system of the tree to develop more quickly. Once the tree starts to crop, annual bearing habits are mostly variety driven or connected to cultural practices such as thinning and pruning methods. For example, in my commercial orchard I grow Honeycrisp apples. After the pollination period is complete I evaluate for fruit set. A heavy fruit set requires proper thinning in order to promote good fruit size and encourage a return bloom the following spring. A semi dwarf tree, like the B118 has the ability on average to grow 6 to 8 bushels of quality fruit per season. How that is translated to size is how well the apples are thinned. In most cases, with wildlife trees more is better, but with a heavier fruit set apples will be much smaller. When a tree is left to fruit heavy one season a lot of energy is spent, new buds for the following season fail to develop, and the tree is pushed into bi-annual production. B118 in my opinion is one of the best rootstock for wildlife projects and I would seriously question what orchard methods of care were done from the read you mentioned.