In my honest opinion the only people that should be worried about this are those who steal cable. I have a encrypted config but i can still see the details of my speed in the operational configuration page. I have just been round to my father in laws who lives 2 doors up and he can see his configuration in the same page as me but he is on 20 meg with config. I will post a screen shot in a min.
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edit no i cannot see the speed now. Just rebooted his modem and it now does not show his speed
This will drive a few more calls into tech support
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Still have no problem with this if it makes the **** bag cable thieves task a lot harder