I guess with his age now , 15 ?, he wouldn't be a scholar so not easy to tell unless someone sees the u16.
Your last five are currently U21 GKs, first two U18s to which you can add Aaron Jones , Wales U17, Matthew Johnson and our recently capture from Man City 16 year old Joe Hilton.
So by my reckoning 10 GKs between 20 -16, so we're unlikely to be too worried about a 7 year old making it. Likelihood is of course that either Joel proves himself a PL GK , or we go out and spend £10-15 mill on a decent GK in the summer, thus keeping all the youngsters out for the next 10 years. The puzzle of how you develop young GKs is a difficult one, our solution seems to be get as many in as possible , one may make it through.