Google Shopping in SERPS - What % of clicks do they get?

[WebpageFX]

Howdy,

Looking for any data we can get on the % of click through the shopping results are getting in Google SERPs.  There are tons of variables: how many products & which position the shopping feeds and images are shown in but any hard data would be helpful.

The background is that we have a client who ranks #1 in Google for a shopping related term and their organic traffic is down in 2011 for this main keyword which has ranked #1 all year since the shopping feeds are continually showing above or below the 1st Google position vs sporadic or no display in years prior.

I.e. They aren't happy the traffic is down & we are looking for some data we can provide them with beyond, "Google shopping is now eating part of your organic traffic for that term".

Many thanks in advance!!

[EGOL]

As you know, Google does not release their analytics data.

However, I have a site that started losing a lot of traffic when google started putting the shopping blurb in the #2 position.  Also another site that started losing a lot of traffic when they added the "Brands" and "Stores" lilnks above the #1 position.

Perhaps the best that you can tell client is that lots of webmasters see the same thing happening.