Apparently many Adsense publishers have noticed increasing problems with Google’s response time. According to a post on Search Engine Roundtable and the Google Groups for Adsense webmasters have been receiving complaints from their visitors due to the Adsense Javascript slowing down the time to load pages extremely. This does not only reflect on massively dropping page hits but also seems to cause plunging revenues.

I have been reading about this problem for a few days now and can see a drop in my Adsense income already. Though not personally affected by the delayed ads - I still view them instantly - Google seems to be having a major problem serving their ads to a great number of networks.