Not really. A lot of Midwest finesse fishermen prefer gopher mushroom heads, between the weights of 3/32 oz. and 1/32 oz. The most versatile and used weight is 1\16 ounce, and none of the midwest finesse fishermen use heads weighing more than 3/32 ounce, and certainly not a 1/6 ounce jig. Z-man made the heavier jig heads without doing much for research, just trying to jump on on all of the hype surrounding the Ned rig. Some people are buying the heavier jigs because they think that the have to feel the bait, and thinking that the ned rig is always fished on the bottom. But a big part of successfully fishing the Ned rig is mastering the "no feel retrieve", you don't want to actually feel the bait. And counter to popular belief, the Ned rig is usually slowly swam just above the bottom, often while subtly shaking the rod tip.
The majority of new comers to Ned rigging are now using the TRD, but the original bait is half of a zinkerz (or SK zero, they're the same bait) with the salt removed, along with several other small baits under four inches. I still prefer and use half of a zinkerz, it is much softer than the TRD which gives it better movement.