For the record, in case anyone is interested, I gave four MONTHS notice when contractually I could have given four WEEKS. And my boss's response was that it was still "abrupt," after which he went on to try to bully me into staying longer. This was in spite of the fact that he knew over a year in advance that I'd be gone by this spring at the latest anyway (so I'm really only leaving a few months earlier than initially planned).
Assuming they make me stick it out until the bitter end, which I expect them to do, I still have three months of my resignation period to go, which is why I started this thread. But it's been kind of weird for me the last few weeks since resigning. Not because of other people; I don't think most of my coworkers know that I already resigned yet, because no one has said anything about it to me. I certainly haven't discussed it with anyone at work besides management, so if and when the others do find out, it won't have come from me. But of course I know, and it makes a difference in how I feel. Though I'm basically with snowball in that it's not that I'm mentally checked out, as much as just not bothered so much by all the stupid political kind of stuff that goes on at work sometimes. Part of the weirdness is that I actually almost enjoy working here sometimes now.