from user pov one click unsubscribe should mean one click unsubscribe
not 'it will take 30 days'
or 'manage your subscriptions'
or the hellish 'login to manage your preferences'
it should be ONE click to unsubsctibe or at worst click unsubscribe and then click a confirm button
from a users pov
YES!
I've had a couple of lists I had to unsubscribe repeatedly because the emails just kept on coming, anyway. Even if I did jump through the managing preferences or subscriptions hoops. Drove me crazy!