I ran these benchmarks on several servers with wildly different results.
Here's a short summary with elapsed times - more detailed results are in
separate server* files.

Server 1:
    CPU:              Intel Pentium 4 CPU 2800 MHz
    Number of CPUs:   1
    Main Memory:      512 MB Synchronous SDRAM PC266
    Manufacturer:     Dell OptiPlex GX260
    OS:               FreeBSD 6.1-RELEASE
    Drive:            Western Digital WD2500JB 250-Gb
    Runtime:          11 Sep 2009 17:53:56.628 - 12 Sep 2009 11:10:52.033

Server 2:
    CPU:              Intel Xeon CPU 686-class 2800 MHz
    Number of CPUs:   2
    Main Memory:      3.5 GB RAM
    Manufacturer:     SuperMicro
    OS:               FreeBSD 6.1-RELEASE
    Drive:            Western Digital 400-Gb drives in 1.5-Tb RAID-5
    Runtime:          11 Sep 2009 20:05:10.805 - 12 Sep 2009 19:25:01.586

    I buried this thing completely -- the benchmark had to be killed after
    14 out of 40 runs, or none of the production jobs would have run.

Server 3:
    CPU:              UltraSPARC-IV+, 32MB cache 1500 MHz
    Number of CPUs:   2
    Main Memory:      8 GB
    Manufacturer:     Sun V890
    OS:               SunOS 5.10
    Drive:            Seagate ST314670FSUN146G 146-Gb SCSI
    Runtime:          11 Sep 2009 20:07:53.990 - 13 Sep 2009 03:12:11.208

    This Sun midrange server with SCSI drives got creamed by three Dell
    workstations running SATA drives.

Server 4:
    CPU:              Intel(R) Xeon(R) 2.0 GHz 686-class CPU
    Number of CPUs:   1
    Main Memory:      2 GB 667 MHz DDR2 ECC RAM
    Manufacturer:     IBM x3400
    OS:               RedHat Enterprise Linux 5 2.6.18 SMP
    Drive:            8 Western Digital 400-Gb drives in one LVM
    Runtime:          10 Sep 2009 22:06:50.148 - 11 Sep 2009 03:45:04.355

Server 5:
    CPU:              Intel Pentium 4 CPU 2800 MHz
    Number of CPUs:   1
    Main memory:      512 MB Synchronous SDRAM PC266
    Manufacturer:     Dell OptiPlex GX260
    OS:               SunOS 5.10
    Drive:            Western Digital WD800JB 80-Gb
    Runtime:          11 Sep 2009 19:58:48.166 - 12 Sep 2009 20:22:34.880

Server 6:
    CPU:              Intel Pentium 4 CPU 2800 MHz
    Number of CPUs:   1
    Main memory:      1024 MB
    Manufacturer:     Dell OptiPlex GX260
    OS:               FreeBSD 6.2-RELEASE
    Drive:            Western Digital WD3200JB 320-Gb
    Runtime:          11 Sep 2009 20:00:36.577 - 12 Sep 2009 07:35:10.401

Server 7:
    CPU:              Intel(R) Xeon(R) 2.0 GHz 686-class CPU
    Number of CPUs:   1
    Main Memory:      2 GB 667 MHz DDR2 ECC RAM
    Manufacturer:     IBM x3400
    OS:               RedHat Enterprise Linux 5 2.6.18 SMP
    Drive:            1 Western Digital 400-Gb drive NOT in LVM
    Runtime:          20 Sep 2009 21:14:37.553 - 21 Sep 2009 05:26:45.646