I think that anything past 4 mi on the East River Pkwy is being measured wrong by the Google Map part of this site. I ran the first two miles today in 14:00 and then the next in 6:37! It includes several longish hills and I think that it must be measuring that wrong.
1st 3 mi - 20:37
2nd 3 mi - 19:31 (I was going faster but not 6:30 pace!)