ES cells Morphed into Islet Cells Apparently Produce Little Insulin

FYI: This has been shown in other studies.

Insulin Secreted by Embryonic Stem Cells Is Derived From External
Sources, Concludes a Study in Cloning and Stem Cells

NEW ROCHELLE, N.Y.—(BUSINESS WIRE)—Jan 10, 2006 - Cultured
embryonic stem cells induced to form insulin-producing Islet-like
cell clusters—intended to replace the insulin production lost in
diabetes—do not produce detectable amounts of new insulin,
according to a report in the December 2005 (Volume 7, Number 4)
issue of Cloning and Stem Cells, a peer-reviewed journal published
by Mary Ann Liebert, Inc. The paper is available free online.