As you say, Musk was tweeting the number of reservations. The TOTAL number of reservations. He was showing the world how popular the Model 3 is sight unseen. It was incredible that more than 100,000 people were so eager to throw a grand at Tesla for a car they knew absolutely nothing about. You bet he tweeted it.
What he didn't tweet was anything about anyone's place in line, other than to say that employees are first, then owners, then highly optioned buyers west coast to east.
And yes, Tesla did determine they needed to ramp up production faster than originally planned, but that was based on total reservations, not based on your place in line. Which, by the way, is far from the number one topic in all the Tesla forums. I have yet to see anyone in the Model S or X branches of this forum complaining that they don't know their place in the Model 3 queue. Neither have I seen the media complaining that Tesla isn't telling anyone their place in the queue.
And yes, some people in this Model 3 branch of the TMC forum are complaining (such as yourself), but that's hardly representative of the TMC forum as a whole, nor of the Tesla Motors forum, nor is it representative of all media regarding Tesla. In fact, for the past month or so, the Tesla related media has been all about auto-pilot. Not your number in the Model 3 delivery queue.
And no, it's not bad customer relations for them to not estimate an arbitrary number that's subject to change.