If you qualify with "what has been diagnosed as type 2..." then yes, sometimes. Many times perhaps. Not always. Because some things lumped into this diagnosis are very different and the diet and lifestyle that is commonly advised won't work at all.

As noted by DTT et all, Type 1 diabetes (what one doc I know calls "real" diabetes) is totally different except for the symptom of blood sugar regulation. And even there if you look at all carefully you see very different patterns. Type 2 has become the catch all for anything that presents with blood sugar regulation that isn't diagnosed as Type 1. That is a dangerous practice!