So, here's the deal. I am ranking with a site 7th for high volume search kw, I'm getting about 4 people a day to a site. My blog is COMPLETELY about subject of keyphrase. I have no idea why, but google analytics for ALL of the visits show "Time on site: 0.00.00", I mean, for completely all of them! How is this possible? Should I be worried? Anyone had similar experience?