Yannick Bolasie clinically scored the game's only goal for the promotion hopefuls, but it was Speroni's string of saves - culminating in deflecting Conor Sammon's 87th-minute spot-kick on to the bar - that were crucial to the Eagles earning a first away win since November.
"I think he's a wonderful person," said Holloway. "It's not just what he's like with his gloves on; he's a wonderful human being.
"I think he epitomises the club - we're fresh, we're hungry, we want to do it. He's been player of the year three times in a row so he's definitely a fans' favourite, and he was absolutely outstanding.
"It's nice to get that monkey off your back and it took a marvellous save from our goalie - I thought he was inspired.
"That's why he's got his own bar at our ground. To do well you need a really good goalie and he's proved that."