He may have been a development squad signing but as the squad is made up of professional players, and not youth team players, Poyet would have still had final say in who we were recruiting at that level as well.
Just like when a player is moving from Youth to a Pro contract it's the manager...
Rohan Ince was signed under Poyet. Upson had already played here on loan and was a full international so doesn't really count as he's going to be known to most managers.
It's already been mentioned that Bloom was impressed with the knowledge that Oscar had on the current squad at his interview...