Well the date might have something to do with it... A piece in Peretz's [REDACTED] before one is in the government...
vs.
A mention after one is Under Secretary of the Treasury, keenly aware that one's country owes on net $1 trillion and that one's administration is counting on a capital inflow of $200 billion a year to give the U.S. a chance at an investment-led recovery, and desperate to avoid having your name linked with anything that might make the people who have $1 trillion invested and are investing $200 billion more slightly unhappy...
Brad DeLong
P.S.: Don't underestimate the sloppiness of Republican opposition research. They confirmed Alan Blinder to be Vice Chair of the Fed without a whimper, after all, even though sitting right smack in the middle of a book he had written in the mid-1980s was an extended metaphor about how inflation was like a cold, unemployment like a lobotomy, and that no sane person checks into the hospital for a lobotomy when you have a head cold... (instead you take aspirin and decongestants: tax-based income policies, moral suasion, centralized wage bargaining, and so forth).