deleting photos from a cf card

[mahesh]

hello.
have any of you photographers out there ever tried deleting photos from a cf card with the camera? well it takes about half a minute if you have a houndred raw files (with my canon eos 350d).
but with rm (and some bashing) it takes about a second.
now, i just want to ask, does any of you know if there are reasons not to use a computer to delete ones images? because many of the books about photography i have read, mentioning remote media, says not to write to the card (e.g. kevin ames and the horrible scott kelby).
maybe it's just windows explorer messing it up.

(if you are interested, i use the command to remove my photos:
Code:

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for dir in $CFCARD; do for file in $dir/*; do rm -v $file; done; done
this action times to 1.278 s., while the 'remove all' function of the camera times to 35.412 s.)