Ext3 Defrag: myth busted!

$ # RT-N66U router with Ext3 formatted USB disk.
$ uname -a
Linux RT-N66U 2.6.22.19 #4 Sat Dec 15 20:34:40 EST 2012 mips GNU/Linux
$ # Using defragmentation script from http://ck.kolivas.org/apps/defrag/defrag-0.08/defrag

$ # Before defragmentation:

$ filefrag ./1080p_6000.mp4
./1080p_6000.mp4: 2242 extents found, perfection would be 8 extents

$ /opt/bin/dd if=./1080p_6000.mp4 of=/dev/null
1840984+1 records in
1840984+1 records out
942584097 bytes (943 MB) copied, 55,6186 s, 16,9 MB/s

$ # After defragmentation:

$ filefrag ./1080p_6000.mp4
./1080p_6000.mp4: 12 extents found, perfection would be 8 extents

$ /opt/bin/dd if=./1080p_6000.mp4 of=/dev/null
1840984+1 records in
1840984+1 records out
942584097 bytes (943 MB) copied, 43,4758 s, 21,7 MB/s


$ # All test done 3 times. Defragmented files are read by 30% faster on Ext3.
$ # Do you still believe that Ext3 defragmenation is not needed?