I have a keyword with a QS of 4. So I added a few articles in the hope of improving the quality score (to get it at a 7 and then work from there). I have waited nearly 2 days but my QS is still 4. How long should I wait to see an improvement?
there is much more to be considered then simply adding more content you can read all about quality score here... http://adwords.google.com/support/bin/answer.py?answer=10215
Redo your pages, make sure to have propre meta tags, urls with keywords in them, trim your keywords in the adgroups, try to keep them under 50 keywords a group. Avoid running lead forms, or put them on a 2nd page if you can afford to. Write better ads. My 2 cents
Create a new adgroup...it's much easier to "start" with a high QS then it is to raise it once it's established