I think it varies depending on a lot of factors (current market, type of position, timeline, etc). My company works with 3 recruiters (NYC) and they all either take one month salary or thereabouts - so about 7 to 10%. I doubt many recruiters go below that rate, but I've heard of startups in NYC paying up to 50% fee.
Cool, thanks. I heard 15-25% of the first year salary and thought that would be abnormally high.