According to this Kelsey/ConStat report. Those that do quickly put 23% of their marketing chips in the PPC basket. I can’t do the math this early in the morning (what would happen if, say, 3 in 9 small businesses put 23% of their chips into PPC), but …there’s a lot of upside left in this particular market. Not to mention what happens to average CPC as more and more competitors get into the market…..
(via Wonk, Internet Retailer)