Bluetooth ReceiveSigned2ByteNumber() Big or Little endian?

I do not see in the documentation whether the ReceiveSigned2ByteNumber is expecting big or little endian. I was sending a data stream over bluetooth as ASCII but the app could not keep up with the data since the ESP32 BT TX buffer is only 32 bytes. I am hoping binary data will help. I am a factor of 10 too slow with ASCII

The endianness is controlled by the property HighByteFirst controls whether multibyte data are interpreted as big endian (true) or little endian (false).