Is hot traffic ever rich traffic?

Quick Online Tips have posted about the effect on their traffic due to being mentioned on the BBC's Click. One of the points that they noticed was that the extra visitors didn't click on the Google Ads, something I have found whenever I have had an increase in traffic.

Whilst my Webometric Thoughts aren't in the same traffic-ball-park as Quick Online Tips (since I started keeping statistics on Oct 9th I have had 8,609 absolute unique visitors, less than QOT has in the average day), there have nonetheless been a few occasions when I have seen an unexpected rise in traffic: mentions on the BBC's internet blog,a recent rise due to my Wii Fit posts, and a comment I posted on Engadget (surprisingly producing my personal high of 176 absolute unique visitors in a day). But the rise rarely corresponds to a rise in ad-clicks.

As I am only discussing a low number of visitors in it hard to draw firm conclusions about the relationship between the number of visits and ad-clcks, although I think it probably goes something like this: Although a small proportion of all visitors will click on an ad, the proportion will be slightly higher for more regular visitors due to factors such as trust, and wanting a site to do well.

I would be interested to know if anyone has ever had a rise in traffic from one source that was particularly rich. Not necessarily a lot of clicks, just a high percentage.