Yet, by the time we see the Romulans again in the flesh in Enterprise Incident, nobody is shocked as to what the other side looks like. The Romulans act as if they have been seeing Humans for years.
The reason why the Enterprise crew was shocked was becasue they looked like Spock. They probably would not have been shocked had the Romulans looked like any other BEM or humanoid. So I can see why a Romulan response(or human response, had they not looked like Vuclanians), would be: "meh."