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Re: 3/8" Plywood shear values on metal studs.

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I agree with your comments, but feel field observation needs to be added to
the discussion.  Actual constructed elements vary greatly from tested
assemblies.  The most notible aspect of 3/8in. ply shearwall failue in
Northridge was that field nailing is often overdriven, breaking the outside
ply. In a three ply system, when you've lost one ply due to overnailing and
the interior ply is junk, your left with 1/8in of material.   In real
earthquakes in real construction, this stuff rips apart like paper.  For
practical reasons, a min. of 5 ply only should be used.

D. Murphy