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Well yeah, these are for gravel race and a foray into Tubeless so I gotta test them out. I was riding a singlespeed with 2.3" ramp tyres to slow me down on commutes so this will also fit that bill. After all the claims about being 'just as fast' though they were more obviously slower than most other tyre swaps I've made in recent history.
So, I now have one data point.
Comparing last couple of commutes on this bike that are conveniently about the same duration, with today, for the same speed I put in an extra 50W / 140kcal today to push those 47mm bastards along.
So, you're right, they're not slow... if you put in 25-50% more work.
(yeah, yeah, weight is gonna be a little different and air density, wind, etc but they're still feel a chore compared to the other tyres)