Welcome to the Q&A Forum

I've just manually edited all of the page titles, meta descriptions and optimised the copy on a client's site.  I submitted this for a new crawl on Google via Webmaster Tools but when I do a Google search the old versions are still showing.  Will it still take a few weeks for the new versions to show even though Google has crawled it via Webmaster?

Apologies if this is already answered, I'm a newbie.  I'm looking to determine how to target long tail keywords.  I'm supporting a site that is new and with very small budgets in the very competitive life insurance market.  If we devise a list of long tail keywords, should we then add those to the page titles, meta descriptions etc rather than the short tail ones that the site will never rank for anyway?