The Elland Road outfit moved through to the fifth round of the prestigious competition courtesy of a 2-1 home win over Spurs with Luke Varney and Ross McCormack seeing off Clint Dempsey's 58th-minute reply.
Warnock was thrilled with the way his players performed and felt the lessons learnt by some of the Leeds team would hold them in good stead for the future.
"It's a fabulous performance," said Warnock. "It's a great day for us. The atmosphere was good, two cracking goals.
"There were a lot of heroes today. It was a typical FA Cup tie today."
"It's not very often that Aaron Lennon has an ineffective game as he did today, and we handled Gareth well as well."