Interesting. Thanks.
I did some further searching and folks seem to agree that clutch type LSDs can lead to surprises in the wet when pushed harder. Some folks suggested that worn LSD clutches don't engage smoothly... jerking traction away from the remaining tire. The iX's viscous LSD locks gradually so it shouldn't have such problems... but I wonder if it allows enough wheel spin that it doesn't really help either.
I used drive a Volvo 240 Wagon with a Dana LSD axle and that was quite stable in the rain & snow... especially compared to my old 2002. The rear camber on BMWs makes our machines a hand-full in slick conditions. My guess is that a dropped car would be even more tail happy in the wet.
Another question is the durability of the iX viscous LSD. Some say its very durable as there are no wear parts and the unit is sealed, BUT many miata folks say their viscous LSD's fluid wears out after 75k, making it act as an open diff.
How durable are these iX LSDs?

?
They seem like a good cheap "street" LSD solution... (in theory).... and with M42 friendly ratios (3.91 & 4.10 )
Anyone out there playing with iX LSD in the rain?