robert76 - 9:35 pm on Apr 7, 2013 (gmt 0)
I kept checking the news to see if some disaster had struck that was taking everyone's attention away because like you, our SERPS hadn't changed so it made no sense.
I actually found myself doing the same checking for news one day last week. We went thru several days last week where ecommerce conversions virtually stopped for a couple hours at a time in the middle of the day. This is totally uncharacteristic as these hours around lunch time are usually the busiest for us. Come late afternoon, activity picked up to higher than normal levels, so overall no net loss in conversion or traffic. What's been going on makes absolutely no sense unless there's been a sudden nationwide shift in shopping time -or- Google's been doing some serious messing around.
Also at the point where we see no relation whatsoever between ad spend and conversions. Could spend $40/day or $200/day and conversion rate is the same.