A recent study that looked 650 newly diagnosed type two diabetics in SW England found that within the first month 36% of patients were on medications. The researchers state that diet and exercise should be first line and all too often medication is used first, then folks don't really try lifestyle change. Diabetes is a chronic condition and worsens over time with the need for more medications and often insulin, the biggest factor with type 2 is weight. So by losing weight right of the bat it will decrease this need.
Its a great idea to consult a dietitian for tailored advice and ongoing support, it really helps.
Source: Diabetes in Control Newsletter Issue 460, Published March 17th