We did an experiment this year. We started the carrots in seed pots and then transplanted them into the garden. We thought this would be a great way to get a head start and not have to thin the planted seeds. I wondered why no one did this. Well... now we know.
Transplanting the carrot seems to disrupt the main tap root - ie: carrot - and results in many crooked and forked roots. They are perfectly edible. A little bit of a pain to peel but made a lot of little baby-like carrots.
And they made great interesting photographs.