Given that physiologically, it's insulin that causes the body to store fat, and that Insulin Resistance in type 2 is ultimately what causes Hyperinsulinemia, then the likelihood is that even if you had started insulin therapy earlier than you did, yo'd be likely to see a similar effect, as you'd still have the insulin resistance, which would mean you'd still require more insulin than someone who isn't insulin resistant.
That's the tricky thing about Type 2 and Insulin. Whilst it can easily be paralleled with Type 1, the insulin dosing algorithms are rather different due to this additional insulin resistance factor.