Toolbars

Who doesn't use google's?

[papamaku]

Anyone know of any stats about % of people who have a SE toolbar in their browsers?
Also a break-down of which one they have? (i.e. it'd be good to know which non-google smaller ones are used)

It just seems that every engine + its uncle have a toolbar now, but is it really worth them doing it?

[Mohamed_E]

On my site I find that searches with a referrer of the form http*//www.google.com/search?sourceid=navclient are a small minority of referrers, somewhere in the range of 10-20%. Do all Google Toolbar queries have that format?