During her speech, Kate, 34, reflected on the end of their 10-year marriage, saying: "Whatever happened, it happened so quickly ... Something had to give."
On his Twitter page Tuesday, Jon, 32, suggested she wasn't entirely honest.
"She claims she 'didn't remember' who called it quits. Hey at least she said 'didn't remember' instead of lieing [sic]," wrote Jon, who has spoken out numerous times that Kate pulled the plug on their marriage by refusing counseling.
He also said that Kate "even slipped last night" by admitting that "we split up a year ago!" (When the fifth season of the Gosselins' TLC show premiered May 25, Kate said she didn't know where their relationship was headed.)
Jon -- who is now seeking spiritual guidance from high-profile Rabbi Shmuley Boteach -- also Twittered that his life is returning to normal in Wernersville, Pa.
"Got up early this morning took Mady and Cara to the bus," he wrote. "Came home to then hug my other six little morsels."