Semantics... sheesh! I see nothing wrong with calling a assigned frequency number a channel. I also see nothing wrong with calling other stuff channels, such as a left and right speakers can be called channels. My TV has channels, both frequency and audio (left/right.) Same basic principle applies to RC radios.

Beginners: If you say may radio is on channel 40, everyone should know what you mean. If you say my radio is a 6 channel radio, again, everyone should know what you mean.