It was a deserved win that could have been by more, but it was their first in the league since the defeat of leaders Swansea middle of September 13 games ago.
"It was like watching a different team tonight," commented Jenkins after the game at Hartlepool where first half goals from Marcus Tavernier and Bradley Fewster proved enough to get the better of a West Brom side who pulled one back with a cracking finish from Kyle Edwards.
"Our energy, our work ethic, our attitude, all things that should be givens, were there and those things combined to allow us get the better of West Brom.
"Maybe it was the hard words that were spoken after the game at Charlton, where quite frankly the performance simply wasn't acceptable, or whether it was the training we have done since that game I don't know, but we got the response we needed and that was the most important thing."
The win closed the gap between Boro and the Baggies to three points, though Albion do have a game in hand.
"If we play like that, maybe with the changed system we used, for the rest of the season there should be a lot to look forward to.
"We have shown at times this season, mainly in the cups, what we can do. Now we need to maintain that consistently."
The U23s next match is on Monday when Wimbledon are the visitors in a Premier League Cup match, the final one on the group stages of the competition and nothing less than a win will do if Boro are to progress.
The game is at the Darlington Arena and kicks-off at 1pm.