[re DMOZ]...one thing I think we've all agreed upon is that it's nearly impossible to get listed nowadays anyway without some sort of connection with the site...you probably won't get listed. Sorry.
I wouldn't confuse DMOZ with a low quality directory.
Whatever Google thinks, IMO it has been a low quality directory for years. And again, the fact that Google occasionally uses DMOZ descriptions does not mean they value the links. More likely the DMOZ descriptions are just less spammy or more relevant to a specific search term than the page description. Snippets are not a ranking factor, just a display factor.