Silva joined Manchester City with a big reputation from his time at Valencia that was only enhanced by Spain's World Cup triumph in South Africa this summer.
Yet success with the national team came at a price, extending his summer break to the beginning of August, then necessitating draining trips to both Mexico and Argentina.
Little wonder the 24-year-old had been unable to show his true form until Thursday night's Europa League triumph over Salzburg.
Senior figures around the City squad believe Silva can be a very influential figure this season, and so does Barry, who feels those voices that have been far too quick to judge should hold their tongues.
"Any criticism of David is unfair because we all know the quality he has," said Barry.
"He was always going to take time to settle because he has come into the Premier League from a completely different type of football.
"Against Salzburg he only showed small glimpses of what he can do. We know he will get better."
Silva himself is confident the acclimatisation process will not take too long but Barry prefers not to put a timescale on such matters.
He is more concerned at allowing the former Valencia wide man the space to adjust without pressure, certain his undoubted quality will eventually shine through on a regular basis.
"The more he plays the more he will improve," he said.
"We know his qualities from training with him every day.
"But he is still adapting. The more time he spends in England and around our players, the better he will become.
"Sometimes it takes a player a season to settle before you see the best of them, but in the end I am confident his will be obvious to everyone."
Manager Roberto Mancini must now decide what changes to make to his starting line-up for Sunday's trip to Wigan.
Adam Johnson and James Milner are both tipped for a recall, while Emmanuel Adebayor will probably be included if he recovers from the dead leg that kept him out of Thursday's trip to Austria.
After dropping points in their last two Premier League games against Sunderland and Blackburn, City can ill afford to fall any further adrift.
Yet Wigan has not exactly been a happy hunting ground for the Blues, who are yet to win at the DW Stadium in five Premier League visits.
What appeared to be an easy game when the Latics shipped 10 goals in their opening two matches, at home to Blackpool and Chelsea, now appears far more difficult following their surprise win at Tottenham and a battling draw against Sunderland last weekend.
But Barry accepts it is precisely the type of game City, having spent so much, will be expected to collect maximum points from.
"These are the games you need to win," said the England midfielder.
"It is another tough away game but after the disappointment at those results against Sunderland and Blackburn it is important we bounce back.
"Overall, things are starting to settle, as we showed against Salzburg, and the longer we spend together, the easier it will become.
"The manager said after Blackburn game that we now have a run of playing two matches a week before the next international break.
"If we can get a run together it will set us up nicely for the remainder of the season."