I wish there was a way for us to record our throttle position sensor's output and show a statistical sampling of it here, for comparison. I guess it would be good to know how much is city mileage, as well.
I remain convinced that good EJ20/EJ25 mileage has more to do with how far down you're pushing the pedal, than with RPMs. In an engine with a decent-sized aftermarket turbo/bigger injectors/pump/tune, daily romps up and down freeway onramps or open roads after a turn, I still get 23-24mpg, even though I shift over 3000 rpms, almost 100% of the time. I'm easy on the throttle from stoplight to stoplight, because there's no point, and I cruise on the highway to work at about 68-69mph. I got high 20's when I was stock/near-stock.
But then, I seem to be fairly good at wringing out good mileage, for some reason. Except with VQ engines. Not much I could do with that one.