One of the things that might have colored my view of Palladium Fantasy fan vs D&D fan is the little forum tussle that erupted early in 3E's life where KS basically said that he was doing "d20" before d20. At the time, not being familiar with any Palladium game aside from HU, I kind of scoffed and said to myself, "Ha! It uses percentile skills! How's that d20?"
Looking of Palladium fantasy, though, I can see a lot of similarities to D&D 3E, despite 15 or so years of separation:
Class skills? Check.
"Free" multiclassing? Check.
No race/class/level limits? Very nearly.
Humanoid type monsters "advanced" by class levels? Check.
I am not suggesting that any of those things are damning, or that KS was "right" -- I just find it interesting that a lot of the "advances" that people found integral and "fresh" in 3E were long present in what's often called (rightly) an AD&D clone. Of course, lots of other games' designs seem to have had an influence on 3E -- ranging from Earthdawn to Rolemaster -- and that I think is a feature of good game design.