As far as i know, Ledson, Kenny, Williams and Charsley have been offered scholarships and will join full time in July
Ledson has played centrehalf for England U16s (bizarrely) and is more of a deeper playmaker in my eyes. Charsley (Ireland U17s) is more offensive and has played out right and left, but as you say, predominantly a centre-mid (has a Cahill-like knack of being in the box at the right time!) and Williams is a very composed all-rounder who lives down the road from me!
One thing that's clearly noticeable is their style of play. Previously we've had, let's be fair, some hoofers and some uncompromising players, but this lot seem to want to play their way out of everything. They're all small lads, especially Kenny, but their intelligence is beyond their years.
Whether we can attribute that to Finch Farm and perhaps to Moyes, remains to be seen, but the proof of the investment in infrastructure is certainly starting with these U16s and U15s and beyond. I saw some 9-10 year olds training last time i went to Finch Farm and they'll have the benefit of spending their entire footballing life up to professional years, at Finch Farm.