Spiker said "badly". I say they do it by assumptions. i. e. Child, so probably T1, although children can and do get T2. If it's an adult, they assume T2 although the oldest new T1 I read of was 92. In other words, they don't try to find out. If they put someone onto insulin immediately, they may never find out. If Oral T2 treatment doesn't work, they may decide it's T1 after all. In my experience, they treat, sometimes not very well and don't bother what they are treating.
Hana
Ps it's all a bit like "sore throat?" must be a virus!