For a single person - it's not unheard of for total comp. You'll really only find that at the big tech players (Google, Facebook, etc.) but for dual income - which is what I think they were specifying... $250-300k per person is "easily" obtainable assuming you also enter that big N company again.

I think he/she meant a total of 500k/600k, in cases where both people in the couple earn a 250k/300k annual salary.