The Mexican scored twice in last Sunday's 2-1 win at Stoke City, notched the winner in Tuesday's League Cup win over Wolverhampton Wanderers and with Rooney and now Michael Owen out injured, is expected to start alongside Dimitar Berbatov in Saturday's Premier League game against Tottenham Hotspur at Old Trafford.
"We tend to build up heroes very quickly here but the boy is justifying the praise he is getting at the moment," Ferguson said after the 22-year-old's late winner against Wolves.
"When he came on you just knew if he got a chance he would take it," added Ferguson, who bought the striker for a reported 7 million pounds before he came to global attention with his impressive performances during the World Cup.
"He's young, sharp and a good finisher," said Owen. "He seems to be thriving, he's always got a smile on his face, he enjoys his football and the fans have taken to him already.
"So far, so good, but, as I know, football changes in a week. He needs to keep working hard and keep putting in those performances because at Man United that's what it demands."
United's fans will certainly expect the good times to keep rolling for one more week at least against a team they have dominated for two decades.
