Walsh was seriously impressed by the performance, comparing Min to five-time King George winner and dual Gold Cup hero Kauto Star.
He said: "I didn't know what to expect coming here. He'd been working grand without burning up the gallop, but he was that way last year, too.
"The ground was definitely drier than I thought it was going to be and I was impressed with him. I didn't think we went slow, he jumped super and I love the way he quickened up.
"His novice hurdle form was good and obviously he just found Altior too good (in the Supreme Novices' Hurdle at Cheltenham).
"He's an easier horse to ride over fences. He has a look where he's going over fences and he's a bit more manageable.
"I was happy with him in Navan but he impressed me today. He reminds me of Kauto.
"I'd imagine with the pace he shows you wouldn't need to be going much further at the minute, even though he probably could."