Actually Nook extracts a PDF TOC as well. Nice! But as with ePub, only the top level, for some reason. Hmm.
Nook does not use PDF page labels in the reading status area, just assigns sequential page numbers. That complicates accurate navigation by page number... For example it is page '198' in the PDF I'm viewing but Nook says I'm on 'page 234 of 846.' Go To Page 198 goes to the page labelled '162.' This means you can't crop the headers and footers without losing useful page references. Okay, I know I should stop 'piling on' now...we've already established Nook's PDF support is 'minimal.'
Kindle would show 'Page 198 (234 of 846)', and Go To Page 198 will take you to the page labelled '198'.