I think you should know by the poster. If it's some guy who has never made a post before or only a couple, then you know to look out for them. If it's one of us regular bunch, then you should know it's not going to be a regular thing.
It will be like having a new player! I think if he has a good mentor (perhaps Clingan?) he can improve no end, and I'm sure he has bags of potential if Liverpool were interested.