Neil Warnock admitted Leeds' attacking players were back in his good books after a first away win of the season.
Argentinian striker Luciano Becchio scored both goals as Leeds ensured struggling hosts Peterborough equalled their worst start to a Football League season with a 2-1 victory at London Road.
Becchio broke the deadlock after seven minutes with a smart finish past home keeper Bobby Olejnik, and doubled the advantage five minutes into the second period.
He was allowed a free header by the Posh defence to convert a classy Ross McCormack chip and take his goal return to four in as many matches this term.
Warnock had been hugely critical of his front four for their displays in the midweek defeat at Blackpool, but was delighted with their reaction.
He said: "We thoroughly deserved the victory.
"The front players were poor in the defeat at Blackpool and I let them know as much, but they were much better today.
"We looked dangerous, Luciano got his goals and we did a very professional job
"You always get greedy when a couple of goals up but I thought we could have seen it out before Peterborough got their goal back.
"You can always be guaranteed that Peterborough will fight for their lives but we managed to get the win. Our back four and goalkeeper were also fantastic."
Peterborough did halve their arrears through summer signing Michael Bostwick's spectacular 73rd-minute volley.
But Posh could not avoid losing their opening three league matches for only the second time in their history, with the previous occasion coming in the 1972/73 campaign.
Manager Darren Ferguson headed straight into a post-match meeting with chairman Darragh MacAnthony before eventually appearing to warn his team to cut out silly errors.
He said: "We're giving away poor goals at poor times and giving ourselves a mountain to climb in matches.
"Leeds' first was as a result of a mistake and the second came after we had lost the ball.
"When we got it back to 2-1 I thought we might get something out of the game but it wasn't to be.
"Our final ball is letting us down but the final 20 minutes were positive and we have to take that forward."