It is an incremental increase in performance compared to the last incremental release. Performance increases should get larger and larger, and more and more frequently, that is how computing technology advances, along a logarithmic curve yet bounded by Moore's Law and the limits of what can be done with the technology of the hour. But there was never once a 100% increase in performance or even a 50% increase in performance between one model and its immediate next revision. And that many seem to be expecting this is tremendously unrealistic.
A consistent 10% improvement at a regular cadence is already exponential growth. Ever-increasing improvements at an ever-increasing frequency would look exponential on a log plot. I don't know how you could possibly expect that and then complain that other people are crazy for expecting exponential growth.
For the last 5 years and the next 5, I expect less than 30% performance increases from one gen model to the next. But it took 20 years to get to that level. A decade ago it was 15% increases in performance between gens.
