One of my sites had a history record of 11% bounce for 2-3 months for several URL's, and overall bounce of 18% for entire site, combined - with all traffic sources included.
At first, I was just happy it's low, and wasn't paying attention, but when it ramped up to 10k visits a day in 2 months time, and when I saw all pages with lowest bounce hitting the G sky positions and literaly crushing the competitors (#1,#2 with site links), I thought about it and had it analyzed.
Side effects on that particular site were that I even ranked for some heavy keywords (like, 1000-1500 visits per day from single keyword) I wasn't even doing SEO for.
Few weeks later, was starting another site, after some time, when I had enough data to analyze user behavior (> 100 UV/d) I got back to design, UX and shit to lower the bounce for second site as much as possible, aside doing the quality content and rest of known SEO stuff.
With bounce around 21-25% (second one, which is, btw, decrease of 7-9% in total compared with what I had before), I see my site also moving up in ranks heavily (from top 10 to top 5).
I'm talking about sites with large competition, and exact searches over 200k for main KW, not to say millions in broad volume. And white hat approach, so it may not apply to shitty autoblogs.
Now, I do see bounce rate being neglected by many webmasters, BH or WH, and it suits me fine, actually
And one last thing; I do recognize effect that strong link building has on any site, but what I've also discovered is - bounce is much easier to control, and you don't have to have more links than competitor to beat them, or - to put it simple - some known SEO elements can be won against the competitor by using low bounce and relevant content
No need for thanks, just send me money
