Perhaps, but if you're sending a small file (like a small .txt) there's not much point in an 'average' speed as even if you're on dialup the file would be sent in a matter of seconds and your speed would not have changed much, if at all.
What's more, I should imagine most people (all mass file traders aside) have no need to have an "overview" of their DCC sends
I don't see a problem with having an option to enable average DCC speed display or something though.
My 2 cents.
Regards,