DXB said in a statement that airport 'recovery will take some time' after there was flooding caused by rainwater on the runway
Jones had made 10 changes to the starting 15 that beat Tonga 35-3 in the Pool C opener on Sunday and while they did not fire on all cylinders against the Americans, the gulf in class was obvious, England running out 45-7 winners.
George Ford, Billy Vunipola, Luke Cowan-Dickie, Ruaridh McConnochie, Lewis Ludlam and a double from Joe Cokanasiga put England out of sight before the United States claimed a consolation score through Bryce Campbell after the final gong.
While England are in a good position in Pool C, there are tougher tests ahead, said Jones, with Argentina and France their final two group opponents.
"Pleased where we are, after two games was have 10 points, conceded one try," Jones told a news conference.
"Can we play better? Yes, we know we can. And we'll need to play better in our next game."
After two games against lower tier opposition, England will come up against a Pumas side fighting for survival after their opening defeat to France.
"We understand they are going to be playing for their lives," said Jones. "They are a proud, passionate rugby country so what's going to be important is we match their passion and we play with a fair bit of control and smarts about the game.
"They are a difficult team to beat."
Jones also highlighted the improvements made by the lower tier countries at the World Cup with the likes of Russia and Uruguay, as well as England's previous opponents Tonga and the United States, giving a good account of themselves.
"You're seeing the tier two countries are much better physically prepared. We've played against Tonga and America now and they've all got big physical packs, they're fitter than they ever have been, and it's a great thing for the World Cup," he said.
While the tier two countries have been loudly calling for more games against the elite teams, Jones said it was hard to satisfy their demands.
"The little brothers are never happy, they always want more," he said.
Standoff Ford said England had used the rolling maul to good effect against the Eagles, with both Vunipola and Cowan-Dickie touching down from them.
"It's traditionally one of England rugby's strengths ... it's an incredible weapon when you get it going," he added.
"The work the lads put in to score a couple of tries off driving mauls is huge, especially in conditions like that."
DXB said in a statement that airport 'recovery will take some time' after there was flooding caused by rainwater on the runway
The 22-time Grand Slam title winner was returning to action for the first time after missing most of the 2023 season
For the company's founders, it was a way to give back to the community
Unlocking Holistic Health: Camp to address all acute and chronic issues
Pizza Di Rocco expands into new communities
World No 3 focused on winning in Stuttgart, Madrid or Rome to get a title on the surface under her belt
Roads were shut and stern warnings were issued as the country experienced extreme weather conditions
The game’s rising stars and DP World Tour winners will be in action over the next four days at the Al Ain Equestrian, Shooting & Golf Club