Actually I was stating that there is a pattern to the "updates" - not so much the backlinks updates although those usually precede the new style "updates" or "refreshes of data" by a few days
As far as the refreshes of data - it used to be that they were ever 3 months almost to the day - then Google started wandering a little and they would be approximately every 3 months - in the last year and a half, they have gone to an approximately every month refresh(although there are also smaller daily updates) where new sites are added in and for some unknown reason the dates that they occur just happens to have been on dates ending in 7 - of course the updates/refreshes usually take a few days so I guess someone could come along and sy they always occur on days ending in 8 and still be somewhat correct
