Well, I've got an answer to this question, and it's "No". It doesn't work. The Wind employee said that Wind sims don't work in dual sim phones, even if they support the right frequencies. He couldn't explain the reason. He popped a Wind sim card into my Acer and, sure enough, it doesn't work.
This is disappointing, as Wind has a data only plan 1 GB for $8.25 per month.