Does a results driven culture mean that independent thinking and creativity are lost?

In a recent Telegraph article, Tony Draper discussed the release of primary school league tables and the impact they had upon how children were taught.

He states: “Children are over tested, over stressed and at a risk of leaving school having passed exams but being unable to think or apply their learning creatively or of emulating the engineers, writers, inventors, artists, actors and philosophers who made Britain great.”

Are children being tested too much? Does teaching to exams stifle creativity and children’s ability to think for themselves?