I wasn't trying to belittle you, and I'm not now, either - I don't care that much. But if you want to grok why I'm still going to say that I think you are incorrect, read this: http://en.wikipedia.org/wiki/Many-worlds_interpretationData's head didn't spontaneously spring into existence in 1893. He was created in the 24th Century by Dr. Soong. Since we know that the 23rd Century is already rather different than the Prime Universe, we have no guarantees that the 24th will be anything like what we've seen before. Therefore, no Data is a distinct possibility.
We've had this debate before. There's no way for the characters to know whether the situation is that the prime and Abrams universes existed in parallel for eons before Nero caused them to vary (or possibly there were variations even before that); or whether Nero created a branch off the prime universe that did not previously exist.
However, my hunch is that the writers intend the latter branching interpretation. And in practical reality, the explanation doesn't matter because any pre-Nero differences will never be part of the storyline so they may as not even exist.