Buts - 2:58 pm on Mar 14, 2013 (gmt 0)
We realized this like 4-5 months ago. Now I'm checking my ranks like ones in a week. And when I'm checking I'm taking it as an average position. Anyway we (at my company) measuring our self just by phone calls.
This was just one way to deal with all the "black market SEO". Google has few more rabbits in their pocket.