Masayo Takahashi is mentioned both tn the ScienceNOW story and the Nature News' story linked in comment# 1. The blockquote in comment# 13 is from the Nature News' story. It strongly implies that human embryonic stem cells were used. So I don't know which source got it right. Is it ScienceNOW or Nature News? There's no mention of induced pluripotent stem cells in the Nature News' story.
But over the past four years, Sasai has used mouse embryonic stem cells to grow well-organized, three-dimensional cerebral-cortex1, pituitary-gland2 and optic-cup3 tissue. His latest result marks the first time that anyone has managed a similar feat using human cells.
Made sure to say the mouse stem cells were embryonic. Did not make sure to say the human cells were. While I am not a biologist, it seems the other article, is more explicit and technical...moreover the particular type of adult stem cells used had undergone a process to make them similar to embryonic stem cells in some important respects...which would explain the relevancy of mouse embryonic stem cells from the block quote from the less technical article.