Yes Sneoh, the UIAA standard edge had an 11 mm radius when I was on the Commission and this edge was also adopted by the CE when the CE adopted the UIAA tests as the standard for PPE ("Personal Protection Equipment for falls from heights" for climbing gear). That was the standard radius in the UIAA Carabiner Standard of the day (I last served on the Commission in 1999-- however I don't believe these figures have changed).
It is true that some ropes failed at the edge during the tests; however the vast majority of ropes which passed the test eventually failed at the knot when tested to failure.
BTW sneoh, the edge is the same, whether testing single ropes with an 80 kg mass or half ropes (AKA double ropes) with a 50 kg mass; "twin ropes" which are meant to always be used and clipped together are tested with an 80kg mass, but together, again over the same edge in the test tower orifice!
A lot of testing was done to try and develop a "sharp edge" test over a sharper radius, but to date the testing difficulties have precluded adding such a test to the standard. These difficulties arise especially since rock edges can resemble a serrated knife blade, and a test edge must have a verifiable polished radius to guarantee consistent and comparable results; it proved easy to define an edge over which no rope would withstand even one drop, but extremely difficult to develop one over which the best ropes would withstand more than one test fall, while the "less good" ropes would fail, in some kind of repeatable and predictable pattern, which is the desired result of product testing.