Generally the consensus, at least among the members of this site, is that some form of carb control is the way to go. There is quite a bit of disagreement about how much, and even to some extent what kinds are appropriate. Here are the main positions:
1) Carb selection - Essentially avoiding "bad" carbs like sugar, corn syrup, processed white flour, and potatoes. Almost everyone agrees on this one, though a few who are more carb tolerant use potatoes in moderation. (most substitute sweet potatoes instead)
2) Carb cycling - Deliberate carb restriction through counting of grams with brief re-feeds at regular intervals. This is more controversial, but does seem to be popular with a large fraction of the members. (may or may not utilize ketosis on low days depending on the individual's plan).
3) Carb restriction - Deliberate "low carb" eating where overall carb intake is kept low on purpose, but ketosis is not normally sought or achieved. This is less popular, but still used by quite a few members.
4) Ketogenic - Purposefully reducing carb intake far enough to reach ketosis. The fraction of members which believe full time ketosis is a good thing is pretty low. While fantastic for weight loss, it's success at fat loss is somewhat less pronounced.
Personally, I tend to favor carb selection. In my mind the key issue is insulin management, carb intake amounts and quality are really just means of manipulating that.