It is automatically mounted with sync:
/dev/sdb1 on /media/wd1200 type ext3 (rw,noexec,nosuid,nodev,sync,data=ordered)

Let's try to change that:

mount -t ext3 -o rw,noexec,nosuid,nodev,data=ordered,async /dev/sdb1
/mnt/test

Much better!

urd:/home/reagle> time `cp test.mpg /mnt/test/test.mpg; sync`

real    0m2.530s
user    0m0.008s
sys     0m0.184s

So the question now, is why is feisty automounting usb drives with sync
whereas edgy didn't? How can I change this?

-- 
[feisty] slow external usb 2 ehci_hcd writes
https://bugs.launchpad.net/bugs/104241
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