I'm at work so I can't go check mine out right now, my new pump is breaking in anyways so I can't even say it would be accurate.. But honestly, I think it's hard to say. Most peoples setup on here will be similar but not identical. What I mean is most of us have the water level in the skimmer chamber 7-8 inches like it has been recommended by ~mojo in the beginning (may be different for some 250+ owners). But, we have different size skimmers (with different pumps) and our wedge pipes are probably dialed in slightly different. Another thing to consider is one of the main differences between the gen1 and 2.. The bubble plate in the gen1 is higher then the gen2 [the top of my bubble plate on my gen1 in100 is probably only ~1" below the water level in the skimmer chamber] - And I would bet that a gen1 and gen2 in100 have at least a slightly different "bb" under the same conditions because of it. Another factor to consider would be your bioload.. I would imagine that 2 identical skimmers under the same exact settings would have a different bb with one having a light bioload and the other having a heavy bioload.
I guess what I'm trying to say is that there is no right or wrong spot to have your bubble break. This is my first skimmer, but others have said it breaks in much faster then others they've had. Still, I don't think you'll have (or should expect) a fully consistent beast in under 3 weeks, where you can see what your bb is for your setup and conditions.