OK, this has been my experience. I reserved my Model 3 about a month after the reveal. I waited about 30 months to get my car. The ramp was pretty crazy and confusing but what ended up happening was Configuration (performance model first), Location (west coast first) and whether you were a previous Tesla owner got initial priority. While somewhat frustrating for those of us that didn't qualify on any of those fronts, in hind sight it really made sense. For a brand new product they wanted to produce the high margin performance models first. Also, they didn't want to increase the complexity of the ramp by bringing long range delivery logistics into it. Thirdly, they wanted people familiar with Tesla and its technology to get the early examples first so they could provide knowledgeable feedback on the early cars.
Now, with respect to the Cybertruck, I don't think location will have as much of an impact this time around. The logistics have largely been worked out with Model 3 and Model Y. I do expect them to produce high margin versions first (tri and dual motor versions). Based on previous experience, I do expect them to consider previous owners first, at least initially. Tesla tends to reward previous owners somewhat and I don't see that changing. The frustration comes when people qualify on one of these aspects but not others. People tend to think the area they qualify for should trump others who qualify in another. Keep in mind, I qualified on NONE of these with my Model 3 and, as close as I could tell, it delayed my delivery by maybe a few months, and that was with the crazy Model 3 ramp. I suspect the Cybertruck ramp to be much smoother.
Bottom line...if you are thinking when you pre-ordered will insure your place in some sort of line, you are setting yourself up for disappointment. I reserved my Cybertruck for the sole reason of locking in Full Self Driving cost, which is very important to me. If FSD wasn't important to me, I would not have reserved and just waited until they started to ramp. But hey, that's just me.
My recommendation...evaluate your priorities and then reserve or don't. After that, FORGET YOU MADE THE RESERVATION and get on with your life. Your truck will come when it comes. If you constantly fuss over the internet worrying where you are in some perceived line, you are going to give yourself an ulcer.
There's a reason I named my Model 3 PATIENCE!
Just my $0.02.
Dan