So, some are saying Google caffeine is already live in places, and will be going live on the American Holiday of labour day which this year is the 6th of Sept 2009

OK it is speculation, but it’s speculation from “those that know” and those  that watch Google most closely, from the place we go to find out the latest happenings while Algo updates are going on etc, so we think this particular rumour or prediction may well be close to what will happen.

“Google has a history of introducing big changes over holiday weekends. No big surprise there, and it makes sense to do it when a larger-than-normal portion of the Google audience is barbecuing or watching parades.

BTW, I agree with your suggestion that Caffeine may not have “all the penalties in place yet.” That would make sense, too: A change this big needs to be deployed step by step. Critiquing or second-guessing a work in progress is a waste of time.“

And yes, second guessing the current caffeine may well be a waste of time, but it’s fascinating all the same.