GPS Accuracy of Garmin 620

I've added the Garmin 620 to my test of GPS Accuracy. I've also included the preliminary results of the Garmin 10 and 610 for comparison. I wondered if the poor accuracy I was seeing in the 620 were due to limitations of the small size, but the 610 looks pretty good. The Garmin 10? Not so much. I'll update my recommendations for best running watch in the next few days.