XDCR: 10 minute wait to replicate final 2 percent of items

Build 2093. 4 node source cluster, 2 node destination cluster.

Populate source cluster with 1,000,000 items
Allow cluster to idle (empty DWQ, DCP queue etc)
Create Uni-directional XDCR to destination.
Observe replication proceeds immediately to 98.1% then pauses for 10 minutes until finally achieving 100% (see screenshot)

Even though replication got there eventually, the 10 minute pause gives the impression that XDCR was broken.

Source Logs:
https://s3.amazonaws.com/cb-customers/davidH/2093/collectinfo-2015-05-15T112909-ns_1%4010.240.149.227.zip
https://s3.amazonaws.com/cb-customers/davidH/2093/collectinfo-2015-05-15T112909-ns_1%40cb-server-2.c.cb-googbench-101.internal.zip
https://s3.amazonaws.com/cb-customers/davidH/2093/collectinfo-2015-05-15T112909-ns_1%40cb-server-3.c.cb-googbench-101.internal.zip
https://s3.amazonaws.com/cb-customers/davidH/2093/collectinfo-2015-05-15T112909-ns_1%40cb-server-4.c.cb-googbench-101.internal.zip

Dest Logs:
https://s3.amazonaws.com/cb-customers/davidH/2093/collectinfo-2015-05-15T112922-ns_1%4010.240.47.236.zip
https://s3.amazonaws.com/cb-customers/davidH/2093/collectinfo-2015-05-15T112922-ns_1%40cb-server-6.c.cb-googbench-101.internal.zip