I dunno… I've got Larsens front and rear that came with my Supernormal. I find them pretty much okay. I wouldn't say they were awesomely confidence inspiring, but they seem to hook up pretty well on anything that does not contain organic matter (brown stuff), or clay. So that leaves – gritty soil, gravelly soil, rocks, stones and sand. Water doesn't seem to bother them. Basically, for example, they work well-ish in the dark Peak at this time of the year, so long as you don't try to go over any peat-laden, mud-infested moorland. I run the rear backwards, for some reason. Oh yes, that's because I don't trust the ramped blocks to provide any forward grip whatsoever.
On the road they are as draggy as hell, in fact I often find people on the streets turning around in surprise, expecting to see a convoy of Hummers bearing down on them.
After reading this now, I think I've almost convinced myself they must not be a good tyre! They're not bad, really! Quite light too..