PDF's and Google Bot

Does anyone have any information on how the GoogleBot behaves when it crawls PDFs?

Is it able to read all the text in the PDF, is it less efficient than crawling plain html, do the backlinks pass "link juice" the same way?

You get the gist of it.

The same way as it does with sites. PDF files are same as webpages, and in a video by terry, i see pdf pages which has PAGERANK!