-D switches on Sqoop's commandline by using HBase Import are ignored

Any chance "-D hbase.zookeeper.quorum" is only used for the submitted
Hadoop SQOOP job, but not for any SQOOP client activities?

When passing -D hbase.zookeeper.quorum=zkhost1:2181 on sqoop's import, there is no error message, according to the log output SQOOP continues to use the conf file based or default settings:

13/01/31 00:41:31 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection

Sqoop reads the configuration via

// Add HBase configuration files to this conf object.
HBaseConfiguration.addHbaseResources(conf);

and overwrite any -D property with the properties found in hbase-site.xml