Originally posted by S_W_LeGenD
Provide evidence of this growth in power.Palpatine felt that Darth Plagueis could defeat any Jedi.
While he accepted that he and Plagueis were more than equal to the most powerful of the Jedi Order, he understood that they were no match for their combined strength—the Sith imperative notwithstanding.
Taken from [B]Star Wars: Darth Plagueis
[/B]
Doesn't matter if he did(although logically he would), he's still canonically better, and Yoda was his near-equal.
Also, Palpatine could believe what he wants, he clearly isn't being the most objective.