tedster - 11:35 pm on Dec 29, 2006 (gmt 0)
Studies I've see show that a organic #1 will generate anywhere from 4 to 7 times more clicks than a PPC #1. There's also an interesting synergy when both are present, at least in some markets, that works out like this. If organic alone attracts X clicks per day, and PPC alone attracts Y clicks per day, then having both in place can attract significantly more than just X+Y. In some cases, it can be as much as 20% more.