Some time ago I promised that I would update you all when I knew more about the timing of landing page load time being included as a factor in Quality Score - and that time has come. ;)
Earlier today the Inside AdWords blog posted the following message. Please note that the actual post has links to several useful pages, so it may be worth taking a look for it. (Because I work at Google, this forum's charter prevents me from actually linking to it in my post.)
Landing page load time now available on the Keyword Analysis Page
In early March, we announced that we'd soon incorporate an additional factor into Quality Score, namely landing page load time -- where load time is defined as the amount of time it takes for a user to see the landing page after clicking an ad. Now, we'd like to post with an update.
Starting today, load time evaluations will be displayed on the Keyword Analysis page, for your review. We suggest taking some time to evaluate and understand this information because, starting mid-June, landing page load time will be incorporated into your Quality Score.
Once you've had the chance to review and evaluate this information, you may wish to make changes to improve your landing page load time. People who click your ads may well thank you for it, by becoming your satisfied customer.
To learn more about load time and landing page quality, please see this article in the AdWords Help Center.
I hope this advance notice, and the info about load time available in your accounts, will prove to be useful to you all.