re ETA2: if it acutely raises blood sugar levels by pulling it out of storage cells, then it makes sense that the baseline chronic sugar levels would be lower,

re ETA2: if it acutely raises blood sugar levels by pulling it out of storage cells, then it makes sense that the baseline chronic sugar levels would be lower, by mass balance; and the development of T2D is more dependent on chronic blood sugar levels, not acute swings. Not saying this is the mechanism, it is just that the correlation should not be suprising.