The Black Country club, currently decimated by injury, would have enjoyed a much bigger margin of success than their 1-0 victory but for the heroics of Ben Foster who put in a sublime display at Molineux.
"I'm delighted with our team's performance, we played well," said McCarthy.
Foster was helpless to stop Stephen Hunt's point-blank finish at the near post from Sylvan Ebanks-Blake's low cross on the stroke of half-time, a strike which put Wolves within one point of safety.
Wolves were more than worthy of their first league triumph since 2001 over Birmingham, who did not even manage a shot on target and McCarthy believes the nature of the success says a lot for his battling outfit.
"I'm pleased, of course I am," said the Yorkshireman. "We've come away with a 1-0 victory but Wayne (Hennessey) has not made any saves of note to be fair. It was an all-round good performance."
He explained: "People keep asking me about team spirit and morale and I keep saying 'It's good'. I'm not sure people believe me but I think performances like that speak volumes for it."
Victory was massive for Wolves who kept their first clean sheet since April, and that was highlighted by the sight of chairman Steve Morgan congratulating his players at the full-time whistle. But McCarthy insists it is nothing out of the ordinary to see the supremo giving his support.
"He cares about it, he's just like everybody else, he wants us to win and do well," said the Wolves boss. "He's very supportive, it's great. But it's not over and above anything else because that's the way he is with me.
"It is nice that he comes down and everybody else sees that, I see it all the time."
Source: PA
Source: PA