AlyssaS - 11:27 pm on Aug 13, 2011 (gmt 0)
It's always been like this. All it means is that Google gets a lot of rank trackers and other scrapers, doing queries but not actually clicking on anything. Add in anxious webmasters doing manual queries to check where they are and you have a lot of activity on G that has nothing to do with search. People don't really check their Bing rankings in the same way.
Then people also use G for non search stuff - eg to get correct spellings (if I'm writing I often do a search for that reason - no need to click, the answer is displayed on the serps itself).