If you get a really high ranking on Google, should you see less traffic? A WebmasterWorld user says that he's getting much higher rankings than before (increases to the first page from page 11) and he's still not getting a traffic boost ("I'm now getting traffic from hundreds more great keyphrases -- but the total traffic at the end of the day is the same as it has been for the past three months.") The thought is that Google is not giving him that boost (but why?)
Some say that this is because even great rankings for very popular keywords do not necessarily bring great traffic. The user argues that his popular keywords ARE bringing him traffic (and they are GREAT keywords), but he's still not sure. The suspicion lies in a correlation between Google AdWords and organic results, but there's absolutely no relationship between the two.
It's still an open ended question. My thought would be to have a good look at analytics and compare the before-after results of the rankings change.
Forum discussion continues at WebmasterWorld.