Load Time Now a Factor in AdWords Quality
If you missed this (and I did admittedly) you missed an important announcement from Google.
Load time is now a large factor in determining your landing page quality score for AdWords.
This effects everything from the design of your pages to the hosting company you choose. Ultimately, in this department, you have to choose between quality and price. Saving $20 a month on hosting could end up costing you much more in the long run if your quality score drops and your marketing costs go up.
It’s something to think about!
Google has a lot of information here (this is a direct link to the part about load time and quality score)