aakk9999 - 3:51 am on Mar 1, 2011 (gmt 0)
I may look at SERPS and open a few results in new tabs one after another. I have FF set not to automatically switch to new tab when opened. Then once I have scanned the SERPs and when I am happy there is nothing else I would like to check, I go through tabs and look at the sites I selected from SERPs.
I do pretty much the same when reading a web page. If a (usually in-content) link sounds interesting, I may open it in a new tab, but continue to read the current page (so not to interrupt my train of thoughts). Then once finished with the current page, I would go to these newly opened tabs. Some I may close straight away if when scanned their content, it was not what I thought it would be.
So yes, bounce rate would be a very noisy signal in this case.