Wilburforce - 9:18 am on Feb 18, 2013 (gmt 0)

A lot of that goes on even before a new module of the algorithm goes live

Not nearly enough, in my view. The results are shockingly bad immediately after whatever-it-is-they-keep-doing (and often persist in that state for weeks). Why we couldn't be given the option of "search using Google Beta" escapes me.

I still don't see, either, why previously favoured sites are consistently dropping hundreds of places. It is as if the human input is saying "put a high negative score on whatever we did before".