Even updated tests (released post-launch of the car) tend to treat them pretty favorably: https://www.cbsnews.com/news/most-small-suvs-fail-insurance-...
I think of the IIHS as a sort of benchmarking organization - not representative of the real world like any microbenchmark, but also correlated with production performance on some level. They seem to do quite well in their microbenchmarks.