Starting today, this load time factor will be incorporated into your keywords' Quality Scores. Keywords with landing pages that load slowly may get lower Quality Scores (and thus higher minimum bids). Conversely, keywords with landing pages that load very quickly may get higher Quality Scores and lower minimum bids.
To learn more about load time and landing page quality, please see this article [adwords.google.com] in the AdWords Help Center.
Is anyone seeing any significant effects from this change?