But it was Jason Tovey who ultimately proved the difference, as the fly-half reeled in an 18-point haul that included a first-half try.
Luke McGrath had crossed before the break for Leinster but, despite controlling the play for much of the second half, they ultimately succumbed to a 23-13 defeat.
And a proud Jones sees no reason why the Dragons - who are tenth place in the GUINNESS PRO12 - cannot cause similar problems for Ulster next Friday.
"Often if there are three or four penalties (in the 22) you crack but we didn't and that was really pleasing to see," Jones told the South Wales Argus.
"The game that we don't want to mention at Sale was about us psychologically not turning up but the attitude we saw against Leinster from everyone was what you'd expect.
"I expected a response and the chat in the changing room is that we now need to go to Ulster on Friday and really have a crack.
"Leinster put us under a lot of pressure and (Ian) Madigan gave them an edge in the second half in their attacking game while Ben Te'o is always a handful.
"But we dealt with the threats and defended manfully on the try line a couple of times. All in all, considering the conditions, a 23-13 score is pretty good."
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