A program can actually never break even despite having broken even on a production basis. It comes down to the manufacturing learning curve. On the current learning curve the 787 will break even (assuming the -10 is like the -9). The R&D costs are still increasing on the 787 program for the -10.
Not sure if I follow your suggestion of the consumer continued purchase confidence as the rate seems to be lower than competitor product despite the efficiency advantage. I would have expected the 787 to outsell the A330 since EIS with a flood of new orders.