mrengine - 3:36 pm on Oct 16, 2013 (gmt 0)
The CTR I am seeing is so horrendously low that I thought there was some sort of reporting error. I have sites that operate in a number of sectors, and all of them are seeing a major reduction in CTR and also the revenue earned per click.
Without any public announcement from Google, other factors must be in play. Poorly designed/targeted ads? A reduction in advertisers as littlecubpanda noted? Shaving? It seems odd that this CTR problem is so widespread and there is not more noise among website owners.