McCarthy, whose side are unbeaten in seven games, said: "Dean is terrific and has been a really good signing for us.
"It was a really good defensive performance in the end from everyone. We are delighted as we have just played a very good team.
"They have got good footballers and keep playing and passing it, Matt Ritchie is an outstanding footballer and Surman is terrific.
"We are on a good run and let's see if we can keep it going. Let's see where we can end up in May.
"I don't get caught up in the nonsense of talking about trying to win the league, let's just try and be as good as we can possibly can and then be realistic as to what we can achieve.
"All the stuff my lads do get you points and get you up the league and keep it competitive all the time. I like to be consistent."