I'll give you this: you're MUCH better at dialog than Rand. I can see Dagny or Hank type individuals thinking the things Rand has them thinking, and perhaps even doing the things they do, but they definitely wouldn't say the things she has them say. Billthedrill was griping last week, rightfully IMHO, about Dagny saying "
when the flood swallows it well go down with the last wheel and the last syllogism
". So far, I haven't caught one of your characters use the word "syllogism". Eschew obfuscation.
“I shall always strive for dialogue of the highest and most realistic caliber, Darling. Or Dear.”