During rebalance client tries to connect the primary node only

I'm adding this bug to identify performance issue that is raised in CBSE-521 and CBSE-528

It is observed during the sdkd scenario tests, that while rebalance is happening, the client tries to connect only the primary node and does not connect to the other secondary nodes in the cluster. During rebalance the topology changes and hence many errors like socket reset, no response received, operation time out, etc.
These errors go away when the rebalance is over and with rebound phase, no errors are observed.
Please see some sample reports:
http://sdk-testresults.couchbase.com.s3.amazonaws.com/sdkd/HWIN-335SPEPOCGT-IHYBRID_fo-ept-rb-Sdotnet-1.2-release-T2013-04-02-00.11.35-LV_MC_BASIC.txt
http://sdk-testresults.couchbase.com.s3.amazonaws.com/sdkd/HWIN-335SPEPOCGT-IHYBRID_rb-2-in-Sdotnet-1.2-release-T2013-04-02-00.21.03-LV_HTTP_BASIC.txt
http://sdk-testresults.couchbase.com.s3.amazonaws.com/sdkd/HWIN-335SPEPOCGT-IHYBRID_fo-ept-eject-Sdotnet-1.2-release-T2013-04-02-00.17.30-LV_HTTP_BASIC.txt

Mark - need your input here too, do you think these errors during rebalance can impact performance or stability at customer site.