Recent figures for % clicks on organic search results vs. paid results

Does anyone know of recent research which gives insight into the %, and nature, of clicks that go to organic search results versus paid search results?

The search engines themselves are, perhaps understandably, not keen to share these statistics.

According to our own primary research last year (Online Marketing Benchmarks) the split was roughly 80:20 in favour of organic, or natural, or editorial, search results i.e. the free ones.

According to Danny Sullivan, and figures coming out of the Search Engine Strategies events, this figure seems still be around the 70:30 or 80:20 mark.

According to recent Panlogic research (soon to be published at http://www.panlogic.co.uk/digital-marketing/press/pressassets.htm) which we have seen, which looks specifically at how the 23-34 age group uses the internet, "More than 90% know which results on a Google search have been paid for and fewer than 15% select those results."

Wherever you look the message certainly still seems to be that by far the greater volume of clicks come from natural rankings - assuming you can get them.