The Magpies head coach does not feel that the Magpies would have had the ability to fight back from 2-0 down earlier in the campaign and now has 'the feeling' that there will be more to come from his squad after a battling, courageous display against Louis van Gaal's men.
“You do get that feeling, but this is how far the team has come from the beginning of the season, and even from Leicester, Crystal Palace, those two games where, could we have come back from 2-0 down? It was questionable," he said.
“Now they are fighting for 95 minutes. It was appreciated by the crowd, appreciated by everybody and that’s the standard that we have set.
“Manchester United are a quality team and they keep the ball and they control it once they’re in front.
McClaren felt a point, which ended their run of four successive 1-0 defeats, was deserved: “Performances have been very, very good against Arsenal, against Watford and again tonight, it was important not to lose and get some reward from the performance.
“We were talking about ‘Boring, boring Man United’ and Newcastle having questionable character – I think both teams showed that that’s not true.
McClaren said: “We have been going about our business quietly and I think we have got two quality players in .
“When I came in in the summer and we were looking at quality players and young players and English players, we tried to get Jonjo Shelvey then.
“It wasn’t to be, but I am delighted to get him now. He’s 23, he’s English, he’s in the England team and I think he’s got more to come, and certainly will add quality and character to this team.
“Maybe that, but he’s a young player who, with the Euros coming wants to be in that England squad, so he has got a lot to fight for from now until the end of the season.