Various search engines are like people. Each one is different. For a long while the major search engines (e.g. Google, Yahoo!, MSN and AOL) would not use meta tags to influence their listings. This seems to be primarily true because of search engine spamming.
Over the last month or two, MSN has regrouped and started using the description tag again. The more things change, the more they remain the same.
As for Google not getting your site in 6 months, the question is how many links to you have from other sites that are listed in G pointing to your site? Are they using the same link text?
The more competitive a phrase is the more likely G is to place you in the "sandbox". There are a number of differing opinions regarding the G sandbox which can be found on forums like DigitalPoint, iHelpYou, etc. The real challenge is to get quality links pointing to your website pages and keep updating content often.
Last, Google has developed their sitemap protocol with a variety of programming choices are now available to facilitate the indexing of your full site quicker. This is often called "deep scans" and can possibly make a significant difference for any website owner.
Hope this helps...