One of my DD HS teammates pitches from the glove and does not separate from the glove until her hand is at chest level. I'm not sure exactly what my DD sees when she is batting but she has mentioned to me several times that as a hitter, she has a lot more difficulty with the rhythm and lack of visibility with the ball hidden so long.
To me, that sounds like a vote for pitching from the glove.
To me, that sounds like a vote for pitching from the glove.