Oh it's just a fan theory, but it makes sense and matches with comments Lucas has made with regards to the overarching themes. It also explains odd things the character does, which must have been intentional since he was a CG character.

Lucas will probably never confirm or deny it officially because it would confirm that either he got scared and made a huge mistake abandoning that plotline and making the story worse in the process, or that he made a bad character a pivotal linchpin of the storyline since Jar Jar is the deciding vote that gives us the Empire.

The actor alluded to it being correct on twitter.

Personally I'm convinced by the scene jar jar was animated behind padme without a speaking role. Animation is expensive and they must have had a plan for why he had to be there -- using force suggestion on her.