I've always questioned the tap root concept on trees grown from seeds. Not so much that the tap root dies for transplants, but whether or not it even exists for most fruit trees. I had a batch of seeds in my refrigerator that had been there for about a year. It was a mixture of apples, plums, apricots, and pluots. I had forgot about them, and my wife was about to throw them out, but I decided, just for kicks, to stick them in small peat pots to see what happened. Low and behold one shot up after 3 days. I'm not sure what it is since I didn't mark the pots, but it's some kind of stone fruit.
Anyway, after 4 days I decided I need to transplant into a larger pot. I can't really go straight outside with it because we have freezing weather coming this week, and yes, I know that November is not the greatest time to be starting trees from seed. Just one of those things.
While transplanting into a larger pot I peeled the peat pot off of the plant and low and behold, there was a 4" long tap root curled around inside the peat pot (the little tree is only about 3" tall right now). I would have taken a pictures for other doubters like me, but I didn't want to stress the plant too long so I immediately put it into the larger pot.
Now the dilemma is what to do? I'll probably just nurture the plant through the winter mostly indoors and loose the tap root. It does change how I will think about growing trees from seed in the future though. You win this time Paul.