A WebmasterWorld thread asks if it is possible to achieve a perfect, five out of five, quality score in Yahoo!'s new Search Marketing PPC engine.
The simple answer is yes, it is possible and many have already noticed a perfect 5 out of 5.
What is interesting is that some have seen a 5 out of 5, but have not seen any bid drops.
I've got several groups with 5/5, but can't find any bids dropping.
This is possible, I suspect, if this ad has always been a five out of five.
Based on some of the feedback, the click through rate is not the only thing determining your quality score.
I have a couple of 5/5 keywords, but also some that have 1/5 and CTRs of 20%+!
As you can see from this document the quality score is made up of several but I always assume CTR was the most important.
Forum discussion at WebmasterWorld.