As much as I loved the jackhammer idea for lettuce, I personally don't think it makes much of a difference, induction or not, how much lettuce you consume. The Atkins carb handbook says that there's about 0.2 net carbs in 1/2 C. of iceburg, so even if you want to eat, say, 5 C. of lettuce, you're barely pushing 1g of carbs. Don't sweat the small stuff!