I have done that mash schedule quite a few times. I guess no one will be surprised to hear me say that I couldn't tell any difference from a single infusion at 148 for 90 min.
You would say that, Denny. I'm beginning to wonder just how tuned that palate really is
If anything, I really like a Hochkurz step infusion schedule (143-145 for 20-30 min, 158-160 for 30-60 min) because it's easy, it boosts my efficiency, gives me good dependable attenuation, and helps with the quality of the finished beer (I think) over a single infusion.