Well I'm asking this because I've changed the keywords in the middle of the day and the global CTR for today is still beeing calculated using my old keywords.
In addition to sem4u's correct response, I'd like to clarify one point:
When one changes keywords in the middle of the day, and then looks at the date range of 'today', the stats that are shown must, by definition, include all information for the day so far - which includes the old keywords.
So, it is true that your overall stats are being reported using your old keywords. But moving forward, the new keywords will be included as well.
Hope that made sense. Sometimes I seem to have a talent for taking a simple subject and making it complicated!
AWA