A frantic second half, containing no less than five goals, was capped by a piece of genius from James Ward-Prowse as Saints ran out convincing 6-2 victors at St Mary's.
The hosts were three goals to the good at the break, before being pegged back early in the second period, but Jaïdi's side finished the stronger after a flurry of late finishes marked a resounding win.
Speaking in the immediate aftermath, Jaïdi said: "It is a win, we scored a lot of goals and obviously we had some of the first-team boys who performed really well and showed a good example of what you need to do at this level.
"We started really well, controlled the game and scored three goals in the first-half. That gave us a good opportunity to show some calm and composure.
"We were lucky to score the fourth goal, which got us back in the game and you saw what happened, we scored a further three goals after that.
"But we need to give what is required in certain scenarios, we could have controlled the game more. Newcastle changed their shape and they wanted to make it difficult, especially after scoring their second goal.
"I think we had all the tools to win this game and it showed tonight."