The documentation of LyX usage in the beamer UG is utterly outdated. Since the workflow highly depends on the LyX version and since LyX itself ships all example files, layouts and also has an up-to-date documentation of beamer usage, I propose to remove all notes on LyX as well as the old example files from the beamer distribution. The LyX people themselves should (and will) care about the documentation of beamer usage with LyX.
(I'm requesting this as a LyX developer and the person who has just overhauled the beamer support completely for the next maintenance release, LyX 2.1. This release will also ship a LyX-specific beamer manual)