I think what's been described as a "normal" divorce here almost sounds like an "ideal" divorce. I've never heard of it going as smoothly in practice with anyone where two parties just sit down and decide they're not compatible, or that they mutually want to end it on the same level.
My dad has been non-MLC divorced twice, once as plaintiff, once as defendant, and both when I was an adult. I learned a LOT about the process from him and on the second one, from his lawyer (my dad has hearing loss, so he took me to almost every meeting so he wouldn't "miss anything"). There's almost always contention on some level. One person pulls the trigger on the R, the other one feels hurt. That part is not different from us.
My dad and stepmom were either fighting or silent treatment for a good year before he actually left - so no, it wasn't a surprise. My mother was flaunting OMs all the time, so when she actually left for one, also within the course of a year or two of meeting him, it was a sting for my dad, but not a shocker, and there was no big personality split. Both divorces went horribly and lasted a long time (though I'm giving him a run for his money on the second one now!). Even he looks at what I'm going through and says he's never seen anything like this before. My attorney agrees - a big reason why anything has been accomplished at all in my D was because he and Hoss' attorney got their heads together and decided they needed something to happen in a courtroom so they could get paid! A year in Hoss was still trying to file continuances so he could avoid it.
But I agree with what has been said about the immediacy of the BD and the big personality change that surrounds what we go through in MLC. They rarely detach from the LBS up to or during the process, which is VERY different, and even for those of us who they seem to vanish to, they rarely want to finish the D (I can think of several of us who will have to take the reigns if we want settlements). There ARE commonalities, but the MLC divorce has more in common with the MLC marriage than with a normal divorce. Escape, avoid, identity issues, one person being cray cray and trying to control everything - even attorneys and judges.