Not that I can add much to the discussion at this point, but I'll chuck in my 2¥ worth. First off, I'm a bit of a Dwarf enthusiast in games. They're actually my favourite fantasy race, to the point that my fiance Is convinced I'm part of the species(I'm a hairy Canuck, so possible). So if anything in here is slightly inaccurate, it's because I'm a bit biased by own admittance.
Looking at the stats in Shadowrun, dwarves are short, but bulky. I've always pictured them as being proportionally wider and much more dense than humans, and their higher min/max in strength and body support this. So while they're not automatically looking like weightlifters, I figure on average dwarf men and women do look a bit more muscular/thick/rugged. Think short hairy rugby players.
As for dwarf personality and society, Shadowrun is different than most fantasy/sci-fi ganes, but it is still a world where stereotypes exist. Not all movers of a metaspecies are part of said stereotype, but they are aware of them. So while many dwarves aren't all brusk, reserved, mechanical tinkerers, I'm sure more than a few don't mind going along with the public perception that they are.
Also, I'm currently playing a Dwarf melee tank adept in a 5E game, and I've got to say, they make damn survivable little balls of death. And the hacker player in my 4E game is a dwarf, so they do get played.
