1) Your comment added nothing, but then this wasn't a high-value thread anyway. 2) Any pronoun in that case would be superfluous. "Holy crap! Congratulations!"

1) Your comment added nothing, but then this wasn't a high-value thread anyway. 2) Any pronoun in that case would be superfluous. "Holy crap! Congratulations!" would be far more intuitive to native english speakers. Choosing to add a gendered pronoun without knowing the correct gender is just... odd. That's exactly the type of situation most would avoid where possible: you omit gendered pronouns unless you know.