Nah I think Turkey gave up on pressurising the US to deal with the PKK months back, since then it's (successfully) been focussing its efforts on pressurising the US to let IT deal with the PKK itself (with loss of Incirlik as implicit tug-of-war stick, compromise on limited-scale-of-incursions as carrot). But that puts the US between a rock and a hard place - either give the Turks the green light and lose the Kurds, or lose the Turks by protecting the Kurds (who protect the Turk-terrorising PKK and its oh-so-US-convenient Iran-terrorising branch the PJAK).  So far, US fear of losing key military-base provider Turkey seems to have won the day?

"Ignoring moralities is always undesirable, but doing so systematically is really worrisome." Mohammed Khatami