Hi Rich.
Good question and the answer is "It depends". How far into the match, was the kicker under pressure, did the kicker have alternate options, how long was the kick - was the kick enough to give sufficient TERRITORIAL advantage, if not tactical as Red won't have the throw.
Consider this, Red kicker makes a really good contact with the ball, is not under any form of pressure and the ball goes a good 30 - 40 metres. Do you call "Advantage over, kicked away not under pressure!" or call the players back only for the red kicker to make less ground knowing they will have the throw or, even worse, not make touch at all!!
If you were the Captain, would you deem the kick to touch an acceptable advantage? Back in the original days of rugby the referee would - allegedly - position himself on half-way and the advantage was requested by the non-offending captain.
IMHO the Advantage Law is the best one in the book as it is down to your judgement and reading of the game at the time and on the day.