Youk and Pedroia fall in that time frame. So did Lester and Buchholz (who has fallen on his face as a #1, but not as a viable starter). Some misses, lot of hits. And many that were valuable trade assets, which has to count.
There are real questions as to whether this staff is up to dealing with young regulars - that is legitimate. At the same time, Bogaerts' falling on his face is a pretty phenomenal overreaction when considering how Pedroia and Iglesias did in extended trial runs at first. Now I wish Bogaerts had a Trout season so we could (correctly) dream of Hall of Fame things for him. Alas, that did not happen. However, he has hung in at the big league level at an age when most of his buddies are in AA - that is an overwhelmingly positive sign. The odds are still very good that he will have a strong career playing baseball for a living.