Funny you ask, i was just given a debanding date and I am still GLOWING with happiness!!!!
My original estimate was 2 years, and the time has been almost dead on. If everything goes to plan (which it may or may not) they will be taken off 1 month early. It could have been FOUR months early, but I had a small issue that i wasnt satisfied with, and opted for her to take the extra time to tweak it. I am really happy with the way my teeth are behaving at this moment, and knock on wood that they co-operate for the next 2 months until my deband!
I am not a big surprize girl, I like to be informed of how things are going, and need to know every little adjustment, coil, spring, bend etc... I think if i got a "Surprize!! I take them off tomorrow!!", I would be verrry skeptical...

but thats just me...
I was surprized to be given a debanding date 2 months ahead.... but she was very clear that that is IF my teeth stay settled...
(I love my ortho!!!!! Everyone in her office is SO sweet)