Information about elapsed time can be easily viewed in Test Manager:Progress Monitor if user use GUI mode.
JavaTest allows users to work in Console mode without access to GUI. Currently there is no way to view total time that was spent on test execution even when -verbose:max option is enabled. User can calculate it only by parsing Start and End date that is not convinient.

That information should be added by default to the following output:
Aug 7, 2012 7:03:12 PM Harness starting test run with configuration "jck_runtime_linux"...
Aug 7, 2012 7:03:15 PM Finished executing all tests, wait for cleanup...
Aug 7, 2012 7:03:15 PM Harness done with cleanup from test run.
Test results: passed: 49
Results written to /local/home/kolmakov/Work/javatest/jt5.
Or should be turned on if some verbose option is set, for example, -verbose:elapsed, if there is some risk of backward compatibility.