Just to clear things up: Joseph Redmon (who made the first YOLO) has anointed Alexey Bochkovskiy as the keeper of the flame [1]. Alexey is a very careful researcher and does a ton of performance evaluation on his models. His results are to be trusted.

He gave a great talk at the London Machine Learning Meetup in April, if you’re interested [2]. (Full disclosure: I run the meetup)

[1] https://mobile.twitter.com/pjreddie/status/12538910781821992...

[2] https://youtu.be/nxOzeTmqe3Y