Interesting.
See I wouldn't teach crosswind landings, as first solo should be conducted in ideal conditions with nil wind.
I believe that you have to reduce the variables, a student at that stage is going to be a bit nervous as the guy above admitted so why add the pressure at that stage?
To that end I would also ensure the minimum amount of traffic by getting out early.
It's a funny thing and I realise that everyone has an opinion however, I'm really careful exactly when I send guys up for their first tailwheel solo as it’s my aircraft.
I'd rather cancel if the weather is going to show signs of dodgy winds.