I see it as more of a case of the Israelites not really understanding what they were asking for. They wanted meat; they got it.
Quails migrate in huge numbers and because of their body shape they use the wind to help them. Unfortuantely meat doesn't keep in the heat if not prepared properly.
Can you imagine what would happen to meat collected and stored after a few days? Food poisoning I guess.
Was God involved? The bible says so. However, natural phenomenon could easily cause this to happen with the blame being laid at God's feet, so to speak.