Bro, all that you mentioned are in order. Just so you know, I took it to Lahore for Eid No AC, as its cold here nowadays, but 5 people in it, and rear loaded with loads of samaan, on the GT road, the gauge didn't move at all, cold as can be. On the way back, I said to heck with the GT road and came back on the motorway, same scenario, kept her on 110 but did manage to hit 145km/h on a flat part of the road, slow I know, but had to experiment, and the needle didn't even hit the quarter mark. Even at Kallar Kahar.
So, if I'm reading you correctly, with the stat in, it should be around half, like my gen 2.5. And without the stat, should ideally linger around quarter? Ties in to what I was told.
Yikes on the Gen 4 comment!