I think your spot on. Timing will get better, it's just a tiny company like Lotus can't compete with BMW, Mercedes for covered trucking space as they probably bring in a hundred times as many cars!
I've heard that the big manuf. like BMW, Volvo book virtually all the covered transport for a number of months when the new models come in.
Lotus could speed up delivery probably if they went to open transporters, but lots of negs to that I think personally.
Lotus is shooting for 10-15 day port to dealer and I'm sure they'll get that point, still on the learning curve.
As has been said before, once the car is released to the dealer, it's really out of Lotus' control on how long it takes to get the car transported by the distribution/trucking company(ies)