Warnock, who said his out-of-sorts side will be facing the Championship's top two sides when they play both Palace and Leicester at Elland Road in the space of four days, spent two-and-a-half years in charge at Selhurst Park before leaving when the club was placed in administration in March 2010.
"They're a fantastic club," Warnock said. "I'm so pleased they are where they are and apart from when they play us I hope they win every game. I'd love to see them in the Premier League because of what we had to put up with down there.
"It was an horrendous time for the whole club and me as well, but I feel really proud of the job I did there, to stabilise the club in the difficult circumstances, to enable the club to go forward.
"Staying up that year, even when I left, I thought was a tremendous achievement and to see them doing what they are now, I can't tell you how pleased I am."
Warnock added: "They've got what I call a Championship mentality in the dressing room. They've got pace in abundance up front, very solid in midfield and take no prisoners at the back. It's a good recipe really and I'm delighted for them, but I'll be doing my utmost on Saturday to put one over them, without a shadow of doubt."