Ok, I'll bring this up once more. I started another 4 forts, played them until the big 2nd spring migrant wave arrived and observed their skills. They came with skills across the board, but the skill levels are definitely NOT randomized.
- Labor skills are at either no level at all, VERY rarely at level 1, and then either level 2 or level 11 (about 50/50).
- Military skills at none at all (about 2/3), otherwise either level 1 or level 3
- Social skills rarely at level 7, otherwise at either level 8 or level 12 (about 90% of all migrants come at least one of those)
That's it, nothing else, no exceptions. Level 2 is "adequate", level 11 is "great", so it all does correspond to what Raven initially reported. It's not that I would like to have more high-level migrants or more completely useless migrants or whatever, I don't care about that. It's just those numbers, as they seem totally not random, and it's boring to have huge hordes of level 2s, hordes of level 11s and pretty much nothing else except those whom you trained up yourself. In DF2010, you could get pretty much anything, from dabbling to grandmaster. Yeah, I know, historic migrants and so on, but I just can't believe there's only two types of worker dwarves in the world, either beginners or almost-masters and nothing in between?
I don't know if it's intended or bugged and I don't dare report it to the bugtracker (feel free to do so, if you're able to reproduce it). I'm playing version 34.07, completely unmodded except for Ironhand's tileset, so that can't be the reason.