Since my T2 diagnosis: 30g/day. Before then, probably close to the RDA, in the form of pasta, rice, bread, potatoes, copious fruit and milk, white sugar in my coffee -- and lots of beer.
I don't "feel" any different now, compared to diagnosis 10 months ago. I feel, and felt, fine. I had no clear diabetes symptoms (and have none now). I've lost 14 percent of my body weight and am exercising a lot more, so I must be fitter I suppose, but cannot point to any obvious "difference" except having to buy a new set of clothes recently. (I was normal weight then, I am still normal weight now, albeit only just.)
Frankly it's been a very strange "disease experience" given that the only proof of illness was a number on a blood-test print-out. An extraordinary reason to change one's lifestyle/diet completely!!!