I am the author of the Lens Blur blog post and the sentence was indeed wrong as a result of multiple edits. Bokeh and shallow depth of field are indeed two different things. By Bokeh we mean that the blur is synthesized using a disk kernel, e.g. as opposed to a Gaussian Blur. The blog is now fixed.
https://developers.google.com/depthmap-metadata/
for the depthmap format.