Can someone explain this to me about brushless esc's

[crazyjr]

I have been doing a lot of reading about the differences on the delta and wye configurations in brushless motors, I am confused. On delta config, all three phases fire at varying levels, on wye config, only two phases are fired. How does the esc understand and adapt to this? It would seem that you would need different programming for both. In all my reading, I never read how the esc reads and adapts to the differences. Thanks for any answers