Off the cuff, I’d say that 30% of the male engineers at my company are married to someone in a technical field, maybe a little higher among the 30-50 crowd. We actually have a lot of couples working here. A lot of the female engineers make full use of part-timing options to have kids while still pulling in decent income.

Average salary around $100k seems credible, with senior PhD types in the $120-140k range. I’m five years post-PhD and making ~100k.