Of course, you are correct it isn't something we base signing our players on, but it's something of a bench mark. I was told it was more so to look out for younger players who our scouts might not have come across and it's used as a bench mark to go on to see if they are actually any good etc, i don't think it's ever used for first team potential signings and even then it wouldn't make a big difference to the signing.
Give me a list of five players nineteen years or younger that you'd like us to sign A-bobs.