TheMadScientist - 8:09 am on May 16, 2010 (gmt 0) [edited by: TheMadScientist at 8:16 am (utc) on May 16, 2010]
NP... It's probably a good clarification so others aren't confused too. ;)
The infrastructure update had quite a bit to do with speed and storage, so my guess is although personalization was rolled out previously it might be 'more impactful' with a higher speed processing system, and IMO will also be 'more impactful' over time even without a change in the processing system, because as time goes by personalization becomes, well, basically more personalized, because there is more data to use to personalize, so in the first month or so it probably had a minimal impact, but over time, as more data is gathered IMO there will be a wider gap in the results each may see based on the personalization, which not only affects the person searching, but new personalizations based on other similar personalizations.
Think about it for a bit... Personalizing something like search results doesn't happen overnight, but rather over time, and the longer it is in place the more difference I would expect in the personalizations presented to each searcher.
[edited by: TheMadScientist at 8:16 am (utc) on May 16, 2010]