I think LCU and Lotus UK have a good feel for how many deposit each dealer has.
The first ten cars for each dealer at least were official order, I imagine the second 20 were as well.
Remember as has been stated before, I suspect they'll have several months production mapped out before the first car leaves the line.
Every indication I have is that all is and has been going according to schedule. Lotus anticipated a ramping up with initial production at 3 or so cars per dealer until they got into full production. Makes sense to do it that way, easier to tweek the production line that way. Probably a couple months to get to full production and of course the plan is around 2300 cars the first year.
Remember also, first and foremost they have to build the cars for the dealer/press launch and then the 40 odd demo cars BEFORE they even turn a wrench on customer cars.
Unfortunately, I think some of the dealers were overstating delivery numbers (not necessarily intentionally) which gave everyone the idea that the cars would be coming in at a much faster pace.
Hell guys, I've been waitin over two years now, patience patience grasshopper!