Last month we reported Google AdWords would begin showing null values for the AdWords quality scores in some cases starting last week. Well, that didn't happen.
Instead, Google announced on Google+ that they will push that off until October 10th, to give advertisers more time to adjust and get ready for the change. Google wrote:
Last month, we announced that null Quality Scores will be rolling out in AdWords https://goo.gl/ObWz9I the week of September 12th, 2016. To give advertisers more time to review their reports, filters, rules, and scripts that rely on Quality Scores, null Quality Scores will now roll out the week of October 10th, 2016.
These null values in the quality score columns will be assigned when the keywords are new or have insufficient impression or click data.
Forum discussion at Google+.