[Commentor] LC-264 Ian Jacobs [Comment] The terms "easily" and "efficiently" are almost unused in the document. In my opinion that do not add much information where they are used and might be safely deleted from this part of the document and from the best practices below. I suspect this entire section could be reduced without significant loss of information to the following: The quality of the user's Web experience via a mobile device depends significantly on the usability of Web sites, of browsers, and of the device itself. Although browser usability (for reading, navigating, and interacting with content) and device usability are important, this document focuses primarily on best practices for improving site usability. [Commentor reply] yes [Working Group decision] 
We agree and we have integrated your suggested rewrite in the section on Phasing, having removed the section on usability as such.