Yes, that seems reasonable. I recently read a new paper on the PDO by Wills out of Caltech which calls 2013/2014 a PDO shift. https://authors.library.caltech.edu/84566/1/Wills_et_al-2018-Geophysical_Research_Letters.pdf Disentangling global warming, multi-decadal variability, and El Nin ̃o in Pacific temperatures