Heh, sort of. I don't really mind, and Waste is capped anyways so it doesn't become a problem (that's why my speed says 'slow dsl'
. But unless you're specifically paranoid, you'll get better speeds (and more reliability too I bet) if you check it.
I think it says 'try' because it depends on several things. Probably both users need to have the option selected. Firewalls are another thing. Then you need to have each others keys.