I'm puzzled by Sally Quinn's take on Hillary Clinton's tweeting debut this week: There were two surprising things about Hillary Clinton’s first tweet. Clinton broke her Twitter silence this week with this bio: “Wife, mom, lawyer, women and kids advocate, FLOAR, FLOTUS, US Senator, SecState, author, dog owner, hair icon, pantsuit aficionado, glass ceiling cracker, TBD . . . .” A photo by Diana Walker showing a serious-looking Clinton in black and looking at her Blackberry through dark glasses is her avatar.