Forward Austin was signed from Burnley just before the start of the season and, making his first start at Exeter, he opened the scoring after just two minutes before Danny Simpson added a second after the break.
Asked about Austin's good start, Jordan said: "It's great for him.
"I think he will be pleased with that and he showed that he is not just a good goalscorer, because he made some good runs as well.
"He ran the channels, held the ball up, and played well with Bobby Zamora and Andy Johnson, so it bodes well.
"It's a huge weight to get off your shoulders when you score on your debut. When you come to a new club, you want to get a goal as soon as you possibly can, and he scored inside two minutes. He will score goals."
Regarding the match as a whole, Jordan added: "We got the goal and it could have been more in that first half hour. We played all the football, created all the chances, and we should have put the game to bed.
"At 1-0, it is never over and we have found that out to our cost in the past. The second goal was very important because they came into it a little bit and we rode our luck for 10 minutes, but I think we were quite comfortable overall."
Tisdale wanted more
Exeter manager Paul Tisdale said: "I expected more to be honest. I don't think we did as well as we could have done.
"I think we could have performed better in the first half. I asked the players to play a certain way, but we didn't show enough energy, except for Liam Sercombe, who looked like he should have been playing for them.
"Maybe it's because we have had two games at the start of the season and we are not quite up and running yet. We improved in the second half and the substitutions gave us a lift, which is what I intended it to do.
"I wanted to be in a position where we had a chance, but at 2-0, I think it was just too much to ask for."