Yep, i think so, obviously. For sure you're way way more knowledged than me. I just checked sudo visudo and i saw that me, as a user, is in there with root access rights.
Just a question, how is (or has been) the default root access in siduction? Su + pswd in a terminal ? For what i can think, is it possible it came with some dist-upgrade done via smxi? (Btw, as far as i remember, sudo is there also in crunchbang, which is wheezy based, mine then, is pointing to sid . . .)