Cut the site into subdomains in Google Panda

This is probably the first time we heard about a big site claiming to have found a solution to recover (part of) its traffic after being impacted by Panda. In summary, the portal of isolated articles contained in its sub-domains ... Is this really the solution? Read these answers! 

Cut a site in subdomains: a technique to return after a penalty Panda? This is what the site claims 
I feel that the subdomains will be popular in the coming months ... Indeed, the site manager announced only after suffering the wrath of Google Panda, it seems to have found a solution (the Wall Street Journal has even published an article on this subject). This site allows thousands of contributors to publish articles. Unfortunately, if there is very good, there are also very poor, which is probably enough to trigger a penalty Panda (because a site can be fully penalized if only part is considered poor. ..).Paul Edmondson has proposed some members to migrate their content to the subdomains. By isolating the contents of each member in a subdomain dedicated actually gives to each of these sub-sites the chance to escape Panda - if the quality of the content is to go. In fact, reproduces a structure of type blogging platform (eg has not had any problems with Panda). 

Since then, members are invited to migrate their content to the subdomains. The first signs are impressive traffic increases from 50% to 100% in just days! 

One of the amazing things in this story is that this site has been provided directly by counsel Matt Cutts. Was it as vague as "Yes, you can try to use sub-domains" or "If you move all your content from bad to sub-areas, the rest of the site will not be penalized by Panda"? 

Is it enough to get out of the clutches of Panda? Are there other elements that have changed and Paul Edmondson has not mentioned? If you know, thank you to indicate in the comments. For example, if I have not found a 301 redirect was set up to migrate content to the subdomains. Also, the subdomains are they independent of the rest of the site (in terms of networking)? 

Is this really a solution to avoid Panda or is it a coincidence? For Panda is updated from time to time and the last official update is Panda 2.2 June 16 But the changes made date from the end of June ... 

Is this related to a phenomenon like premium cool? 

In short as you can see I ask myself a lot of questions. In fact the moment I do not advise to those who have had a problem with Panda to create lots of subdomains. Do not act in haste!