As indicated in the title, you will find in this webpage a ranking of the 10 top research center (according to the average of citation per paper)
http://sciencewatch.com/dr/sci/08/may25-08_4/Cold Spring Harbor Lab is number on with an average of 91 citations per paper
It seems that Boston is the place to be for research. If someone find a similar link with more than top10, it will be interesting.