Defintely true. He turned down at least two trades we know of, and neither was an insulting offer.
OTOH, he is rapidly running out of trade chips. The farm had no real breakout candidates this year that became a good one, and he is going to have to remove some salary while adding salary. JBJ, given his years of control, salary, and prety much a whol bunch of other factors - like him being a desirable player to acquire - does make him one of the better tade baits on the team if DD wants to get a missing key piece back...