Rohan, a 57th minute replacement for Paul Konchesky, levelled the scores with 12 minutes remaining after Swedish striker Markus Allback had headed Villa into a 66th minute lead. Another substitute, Bobby Zamora, also impressed David with his impact on the game.
"We needed a bit of jiggery-pokery and Rohan can give us that - Zamora also played like he'd got a rocket up his backside from somewhere!" quipped the caretaker boss.
"So I'm delighted as it helped transform us, although whether it was Villa's goal that did that is debatable.
"I will say that the conditions were very difficult for both sides, there was a swirling wind and I've not seen so many clearances go into touch."
Zamora came on in place of Helder Postiga on 73 minutes and David repeated the fact that the young Portuguese striker just needs time to settle into his new environment.
"He's working very hard and getting used to it, but the language is a barrier and it is not easy. It does take time for players to adapt and he showed good determination and effort, but the ball did not run kindly for him."
David Pleat saluted a spot of 'jiggery-pokery' from goalscorer Rohan Ricketts after the young midfielder provided the platform for the securing of three points against Aston Villa on Sunday.