Most of them are false, if you read the journal of the whills ( Star Wars first draft in 1973), he already talks about the Sith.
The dialogue in the ESB screenplay was " No, Obiwan Killed your father"
Jar Jar Binks always was intended to be what he is.....A lamo.
The Jeff Goldblum one could be true, i dont know.
R2-D2, totally not true.
"In a very distant future", was actually used in one of the drafts, but was later changed.
A real funny fact: In one draft , Luke punches Leia in the face and stomach to save her because she didnt want to leave her soon to be destroyed planet of Aquilae.