Aston Villa's youngsters beat Arsenal's under 21 side 1-0 earlier in the week.
Villa beat Arsenal 1-0, to end the Gunners' seven match unbeaten run at development level.
The Claret and Blues scored their goal through Jerell Sellars, and Garde was impressed by some of the young talent at the club.
"I think some of the players are improving at the moment - the desire and what they showed in that game was very interesting,” the French boss said.
"The road is long and the gap is important between the reserve team and Premier League football.
"But it can go very quickly if you have the right attitude with the base of talent that some of them have shown.
"They work very hard and with passion. It could be a good surprise for Aston Villa's future.”
Villa’s under-21 side made the headlines earlier this season, when they beat the Claret and Blues' senior squad 3-0 in a training match.
There has been calls for more of Villa’s youngsters to be called up to the first-team, and Garde has shown a willingness to pick them in recent weeks.
Jack Grealish has become a prominent member of the first-team squad, while Andre Green was handed his debut against Tottenham Hotspur last weekend.
Garde’s comments about Villa’s youngsters showing desire are also particularly eye-catching.
Garde has previously promised that he will only pick 11 Villa player who show fight, and it could be that more prospects are handed their first-team bows between now and the end of the campaign.