Thought I’d update this now I’ve had a couple of decent rides on them.
In short – Good. Very good, in fact. Off road, in exceedingly dry and dusty trails, they have WAAAAAY more grip than the file pattern Strada Biancas they’ve replaced. On off camber sections, I could hold a lot more speed, and cornering with a lot more confidence. OK, they’re still 30mm, so hardly up there with a MTB tyre, but for my intended use (60/40 road/gnarmac) they’re excellent. No indications of flint cuts. Yet. They’ll come, but first impressions are that these are a lot tougher, which is a good thing.
A little slower (perhaps*) on road sections, but negligible I’d say. I’m interested to see how they cope when it gets wet again, both on and off road.
All in all, a very good choice for the faster end of the gnarmac spectrum.
*Recent rides have been the day after some highly refreshed evenings, so it could just be me being slow!)