You should've realised that the website is woefully out of date on many subjects, and contains many inaccuracies.
Take a look at how many posts are quoting that the Uno cannot be used with arduinoisp for example.
As a noob, I didn't realise that Texy. I guess, as an open source project, it's up to us all to contribute where we can, e.g. updating the documentation. I plan on helping out a bit when I begin to understand it myself... XD