The pundit has been discussing the Eagles after their 3-1 win over Norwich City.
There may have been an element of fortune about Palace's 3-1 victory over Norwich City, with Cameron Jerome's equaliser to make it 2-2 ruled out for reasons many feel were unjust.
But Alan Pardew's side still impressed and Keown is excited by Crystal Palace's strength in depth.
He singled out the quality of the south London club's substitute bench, as well as Wilfried Zaha and summer signing Yohan Cabaye.
Asked who impressed him most, the pundit said during a Tackle Keown session on the Mail website: "I was impressed with Crystal Palace, particularly the strength of their bench. They had Patrick Bamford, Yannick Bolasie, Dwight Gayle, Martin Kelly and Mile Jedinak.
"That kind of squad depth is so impressive but has almost gone unnoticed. Alan Pardew has won 11 league games in just 19 matches in charge, which is already a club record. And on the pitch against Norwich it all looked good, too.
"Wilfried Zaha looks far more comfortable back at Palace than he ever was at United and Yohan Cabaye scored on his debut. So the future looks very bright for them."
How far can Palace go?
With Pardew already breaking records at Selhurst Park and the club having strengthened considerably in the summer transfer window, where can the south London club really go this season?
Staying up appears to be well below what Crystal Palace fans are expecting this term, while mid-table may not be enough for some.
The aim of a top-half finish certainly isn't unrealistic - while talk of Palace qualifying for Europe will be inevitable if the Eagles continue winning Premier League matches.