I would put all the ones you listed as very fast acting carbs. Onions, garlic, Brussel sprouts and the like I would put at medium, and peppers, cruciferous veggies, and green leafy veggies are to me, slow. Check out the GI (glycemic index) if you want specific rates.
That being said, don't put too much stock in it. Get your carbs from veggies, root sources, and if you handle the well, maybe whole grains, and you're set. Stay away from refined sources and you are good to go.