Google SERP Changes Result in Traffic Spikes
This hike seems to follow a decrease in traffic by half around 20th December 2007.
In order to get the correct count some Webmasters have used the site: operator.
Reseller posts at Webmasterworld "I’ve been staying clear of these threads but my traffic is up 40% since Wednesday" Are we still talking about your same "watching the grass grow" site which had lost traffic in 2005/2006?
For SEOPTI "… it’s steady, one of my sites shows exactly Results 1 – 100 of about 791,000 using the site operator."
Seems like a lot of tweaking of SERPs by Google recently. The discussion continues at Webmasterworld.