I don't think that's likely to be the case. It comes with an 87 watt charger, but USB-C is specced to provide 100W. Surely if it needed more power, they just would've included a higher powered charger?

However, I just saw that Twitter thread from MKBHD linked below, so... maybe it's true. Perhaps Apple simply failed to include a high powered enough adapter and should've gone to the full 100w.

[Edited with more relevant info].