Really? Do you have evidence for your statement of fact?

I would think both are a factor.

This doesn't really back up his argument, but Nielsen's done all sorts of research on how much people read:

http://www.useit.com/alertbox/percent-text-read.html

In summary: On the average Web page, users have time to read at most 28% of the words during an average visit; 20% is more likely.

So length is definitely an issue. Not sure on organization, but I really can't see the simpler FAQ style /not/ helping with scanning the page.

I read 0% of 100% of the Terms of Service I encounter because they're not worth my time to parse. I actually read through this one. Anecdata.

The best kind of data! :P