kbell - 4:30 am on Feb 1, 2008 (gmt 0)

In my experience, the less competitive the term is, the more stable your rankings are for that term (whether you rank high or low :) Depending how far down the tail you go though, you start to have to rank well on a vast number of terms to get similar traffic and conversions to the more competitive terms. On the other hand, people down on the end of the tail are often very qualified, so we see a fair number of keywords with 1 visitor per month = 1 conversion.