Verbose level quiet output the same amount of information as a default level of verbosity.
How to reproduce:
$java -jar javatest.jar -open ~/Work/javatest/b13_1/config.jti -verbose:quiet -runTests
Sep 24, 2012 2:46:41 PM Harness starting test run with configuration "jck_runtime_linux"...
Sep 24, 2012 2:46:44 PM Finished executing all tests, wait for cleanup...
Sep 24, 2012 2:46:44 PM Harness done with cleanup from test run.
Total time = 2s
Setup time = 0s
Cleanup time = 0s
Test results: passed: 18
Results written to /local/home/kolmakov/Work/javatest/b13_1.
$

According to Help: quiet level should "suppress all details, overriding the settings of individual verbose options". So output should be empty:
$java -jar javatest.jar -open ~/Work/javatest/b13_1/config.jti -verbose:quiet -runTests
$