I think this is more question for Alan, but I think that it does not affect too motor much.
There are two effects:
1/ delay after commutation (or better phase shift) of current in winding. This does not affect motor too much, because we can compensate it by advance angle.
2/ PWM efectivity. Induction makes current in coil flat. PWM are rectangles of voltage, but induction makes current more flat. It makes motor more effective in PWM mode, because the current goes via winding also after closing of transistors, it goes via diodes back to battery as a charging current and then back to coil when transistor is opened again. But in any case, 3 phase leads should be as short as possible, because that induction converts voltage ov battery to lower voltage needed for proper RPM like a transformer, and it also means that the current in 3 phase leads is higher that the current from battery. But the reason is its resistance, not inductance.
Leads between battery and ESC can be longer. ESC should have quick and large capacitors to suppress charging current to battery, it should catch all spikes from winding and give it back to motor without going to battery, so long leads does not make troubles, but in reality also those leads have some inductance, so if you use longer leads, you should use capacitors every 10" or so.
But you can figure it out yourself ... for example winding of Axi 2826/10 has ~7uH if I remember well.