Thing is, it's not even going to do that. You have to be on the (first) page to trigger Reader, so you'll see ads anyway, and it will fetch all the pages one by one when reformatting them.
They just built Readability in the browser (literally, there are acknowledgements to Readability in Saf 5)
They just built Readability in the browser (literally, there are acknowledgements to Readability in Saf 5)