tedster - 11:30 pm on May 1, 2010 (gmt 0)
You may well be right. My first idea was based on misunderstanding the length of the queries that people were calling "long tail".
2- and 3-word phrase are what I think of as the "fat belly" - it's in between the "head" (trophy) phrases and the "long tail", which is more like a 4- or 5-word phrase and beyond. (That's a 4-gram or a 5-gram, in IR talk.)