Ran it twice; once with Firefox and a few other apps running, and once with a fresh reboot.
System:
2009 Mac Pro
EFI upgrade to 5,1
3.33GHz 6-core W3680
32GB RAM @1333MHz
Areca 1880ix-12 attached to 8-member RAID6 (set as scratch)
ATI 5870 running dual monitors, 22" Dell and 30" ACD
Ran test on CS5 (PS v12.0.4)
Test with other apps open: 13.0 seconds
Test with fresh reboot: 12.2 seconds
That seems respectable.
Whoops, forgot I had Geektool running, and there are a ton of shells running with that enabled... so I disabled that and ran again without a fresh reboot, and did even better!
11.7 seconds!