Microsoft wrote:When burning your DVD’s please do so at 1x or 2x and CRC them when done using the CRC utility posted on the Connect site. The customer experience improvement telemetry that we’ve been getting back on Beta 2 shows that not quite three quarters of setup failures are the result of a failure to read from the media. Testing shows that burning at slower speeds greatly increases the chances of a good burn.
I think kg_evilboy at CD Freaks puts it best:
Microsoft was owned by an idiotic fallacy.
credit goes to jamieshea at CD Freaks for finding this!