Bob Daemmrich/PolarisThe author at a 2007 book signing. Lorenzo Ciniglio/PolarisAmy Chua, author of “Battle Hymn of the Tiger Mother,” with her husband, Jed Rubenfeld, and daughters Lulu, left, and Sophia. January 14, 2011Retreat of the ‘Tiger Mother’By KATE ZERNIKETRY this at a dinner party in one…