It cannot be stressed too much that team learning is a team skill. A group of talented individual learners will not necessarily produce a learning team any more than a group of talented athletes will produce a great sports team. Learning teams learn how to learn together.
If anything, team skills are more challenging to develop than individual skills. This is why learning teams need "practice fields," ways to practice together so that they can develop their collective learning skills. The almost total absence of meaningful practice or rehearsal is probably dominant factor that keeps most teams from being effective learning units.