United were knocked out in the semifinals by Chelsea.
Ferguson said: "Of the team who won the Youth Cup last year, seven have been in the first team at different points this season: [Paul] Pogba, [Ravel] Morrison, Fryers, Cole, Lingard and the Keanes.
"It's a good group of players. The present youth team lost in the semi-finals of the cup but they had only three second-year boys, whereas [their opponents] Chelsea were all second-year scholars. They were a bigger team, much stronger. We had eight first-year boys and, for example, our left centre-back, Nicolas Ioannou, is only 16. So they didn't let themselves down."