I can honestly say I've never heard of that happening. I have pushed my wheels to the limits on the track as have many other people I've known, on Rotas, and have had zero issues. I've also hit some pretty serious pot holes and have nothing to show for it. I have never heard of anybody having any "abnormal" rim issues on Rotas, aside from he said/she said hearsay.
There will always be problems with every product out there, and there will always be somebody who paid twice as much for essentially the same product, waiting to point the finger and call it a bad product.