Google AdWords has made some modifications to its Landing Page Quality Score writes Barry Schwartz at Search Engine Roundtable.

According to Google, only a small number of AdWords advertisers will notice an increase in their minimum bids and the majority of advertisers will not be effected.

Publishers however are sounding off in forums (and these publishers probably have much more aggressive AdWords campaigns than the majority of AdWords advertisers):

So I’ve had a campaign running for keyword and I happen to have keyword.org as the domain. Ad and landing page are all about keyword. Suddenly overnight all the keywords that were getting double digit CTR’s have been reevaluated to “poor” and I’ve been asked to pony up 20X more per keyword.

Today I got many of my best keywords in different campaigns go from Great to Poor (with $10 bids!!!!).

More on Google AdWords Quality Score