Actually entitlement plays a major part. Quite a few people were even demanding that the DLC be made free due to their 'suffering'.
Heh, whilst I do agree with what you say, that notorious tweet (we haven't announced plans for a release...) was quite badly worded.
He should have said "we are working on bringing it to both platforms, but have no current timeframe for a release." I fail to see any reason why some knob in a suit would gag him from a statement like that.
Then again, who knows whats going on behind the scenes eh?