The 25-year-old has made a clutch of Premier League scouts sit up and take notice this season and Davey is grateful Cryne had the fortitude last month to resist some serious offers for the club's prize asset.
After Tuesday night's Championship clash, Davey said: "Jamal's a tremendously hard worker. When we've asked him to do things in training, he's always last (to leave) the training ground, always the first out.
"He's a great lad to have and he always wants to learn. We've spent time with him over the last 14 months since he's come in.
"I think a lot of people will have said his end product wasn't what it should be and we worked on it with him.
"But it came from within him and he wanted to improve and he's now showing that he can produce all the skill, produce the pace, the aggression and he's now got an end product and he's becoming an all-round player."
Davey acknowledged the prospect of renewed bids coming in for the 25-year-old after serious interest was fended off during the January transfer window.
Davey added: "Yes there's interest. We turned down bids in excess of a million pounds in the window.
"That shows the ambition of the club and the ambition of Patrick Cryne to keep hold of him."
Davey revealed the club's enforced two-and-a-half week break had enabled his latest signings to settle in at Oakwell.
Coventry striker Michael Mifsud and Fulham midfielder Andranik Teymourian - both on loan until the end of the season - made their long-awaited debuts and another recent acquisition, Daniel Bogdanovic, lined up for Davey's band of foreigners.
Davey said: "The rest has given us the chance to bed quite a few players in and they all performed well.
"Our system caused them problems in the first half and second half, Sheffield Wednesday are always going to dominate spells at home, but our defending was fantastic."
Barnsley owed their first win of the year to defender Bobby Hassell's brilliant late goalline clearance after Owls striker Marcus Tudgay lifted the ball over Tykes goalkeeper Heinz Muller.
Davey added: "Heinz got breached once all night and when he did Bobby was there and that's what they get paid to do."
Wednesday manager Brian Laws was furious after another below-par display from his side.
The Owls were on top of the world 10 days ago after their historic derby double over Sheffield United, but they have lost successive matches to local rivals Doncaster and Barnsley and have won only two of their last 11 league matches.
Laws said: "I've got to try and not go over the top, but I was very angry with our first-half performance, particularly our negative play.
"We're at home and we've got a great crowd behind us and we played with fear in our bellies in the first half and I've never seen us so negative with our passing.
"Second half they defended for their lives, we camped in their half, but just could not break them down."