Please don't use URL shorteners. There's no need for that, it's not Twitter here :)
This URL: http://sites.google.com/site/webmasterhelpforum/en/faq--crawling--indexing---ranking#subfolder-subdomain
Is not Google's webmaster help. That's someone else's site. Google's is at http://www.google.com/support/webmasters/
From this: http://www.searchenginejournal.com/subdomains-or-subfolders-which-are-better-for-seo/6849/ (which you've also linked to)
For blogs, I prefer a subfolder (http://www.seomoz.org/blog/) because the link juice which is sent to that blog is going to be naturally distributed to that main domain, and other subfolders under the domain.
With a subdomain, the forum or blog will be listed as a separate entity in the Google search results, which is good for owning the results and one’s reputation management. However, Google and other engines will generally not list more than two of these subdomains in the search results, unless those subdomains can prove to Google that they are independent and relevant entities.
Wanna talk abotu Matt Cuts on this? Read http://www.mattcutts.com/blog/subdomains-and-subdirectories/
Yes, it's a 'wash', but even he points out
For several years Google has used something called “host crowding,” which means that Google will show up to two results from each hostname/subdomain of a domain name.
A subdomain can be useful to separate out content that is completely different. Google uses subdomains for distinct products such news.google.com or maps.google.com, for example.
They are different, SEO wise, and there are reasons to use them and reasons to not. But they're different and will be reflected differently on Google Search.