Update Jagger is still not over. This update even has official parts to it - Matt Cutts, at least, has been referring to three different parts of Jagger. Jagger1 should be completed by now and Jagger 2 may be over or may be still spreading to additional data centers, as Matt indicated that this would take several days. Jagger 3 is expected to start tomorrow - Wed., Nov. 2nd. according to Matt, both in his blog and a recent post at Webmaster World. This third part is expected to address some canonical issues. It will be interesting to see how that turns out. Jagger 3 is also ‘the base that I expect us to build on going forward’ - I don’t know what Matt meant by that either - but eventually time will tell.

Other observations about Jagger? Some people have reported that reciprocal links seem to be counting for even less now - and some people believe their sites have had SERP drops due to too much reciprocal linking. Other people report that they have done many link exchanges and their sites are doing fine. Must be some combination of at least some type of reciprocal links (off topic?, too many?, too large a %?) and something else that is making their sites go down.