Caught a little of TGC Academy Live last night. They had Matt Killen (Kenny Perry's 20 year old coach). He actually stressed the "flat left wrist, bent right wrist" as a key component in a good swing! He even drew lines on Kenny's hands at impact to show it. Went through a version of the basic chip motion as a drill to ingrain that feeling.
Seems like a good young teacher. It's always nice to see some of the TGM fundamentals highlighted in one of these shows.