Landing page load time in Adwords quality score

Google Adwords has announced on the Inside Adwords blog the introduction of a new factor in its Quality Score algorithm. On the Keyword Analysis page, the keyword is graded based on the time the page takes to load and given a score of:

• This page loads slowly
• No problems found
• No problems found. Load time is faster than average in your server’s geographic region.

This can negatively or positively affect a keyword’s quality score and subsequently it’s minimum bid.

This brings to light the question: If Google has developed a system to grade the landing page load time, how long will it be before the same system is used on natural listings to weed out bloated flash front ends and pages that redirect several times before reaching their final destination? Or is that where the technology came from originally?