Google has answered people's question regarding the recent update of the Landing Page Quality. In the two part series on the AdWords blog Google answered three questions:

1. Why did you make this change right before the holiday season?
2. Can a page that has a high CTR or conversion rate be considered a poor quality landing page?
3. Will using Website Optimizer improve my landing page quality?

For the first question Google said they had made the changes in order to give your customers good user experience through a better landing page and it will also make your ad more competent than other low quality ads. The last question was answered by Google saying “Using Website Optimizer to experiment with your landing page does not have any impact on your Quality Score or your landing page quality. Website Optimizer evaluates your conversion rates to tell you which marketing messages are converting most often on your landing page, whereas the Quality Score doesn't incorporate any conversion information. Please remember that once you've made a change to your landing page based on tests run with Website Optimizer, the Quality Score may change as with any other changes to your landing page.”