[pdonis]

> The poster I replied to was implying that due to the strong tailwind, they had to maintain an increased airspeed.

No, he wasn't. He explicitly said the opposite:

"higher ground speed to keep the same relative air speed."

[danaliv]

I think the confusion here is stemming in part from the fact that "relative airspeed" isn't a well-defined term. In aviation airspeed means the speed of the airplane through the air (modulo specifiers for true vs. indicated vs. calibrated airspeed).

[pdonis]

> "relative airspeed" isn't a well-defined term

The original was "relative air speed", which I would simply take as the way a person not familiar with aviation terminology would say "airspeed"--speed relative to the air.