gn_wendy - 8:38 am on Dec 22, 2009 (gmt 0)

The lower drop in click through might have been due to the fact that #1 was Wikipedia which many avoid same as paid ads.

I can confirm that, at least for one of my sites. We run products - and wikipedia will obviously not have those products - so the wikipedia results are skipped.

However, an information site I also have saw very heavy click losses when overtaken by the wiki-monster.