Yeah, well I've been on both sides of the issue, so I understand it better then most. I don't think that the people really knew what they were doing when they stuck the audio discs in the K-Hypermedia box. I'm sure somebody though they could be burned at 48x, and with some devices, say a CD duplicator, maybe they can be? I ran into something similar with speed issues a while back, when I complained to one of my previous suppliers that the business card CD-Rs that he sold me were "certified" for 24x, but could not be burned higher then 8x. This is because the drive will not let you... oddly, his CD duplicator let him burn them at 24x without any problems, so I kinda lost that argument [:p]. So as annoying as it is to the consumer, as long as the provider can in some way proove that the discs burn at their "certified" speed, we can't really do too much. Unless of course you want to try to bring the issue up with Philips, who is the one who makes all the rules for certification, but I doubt they would do anything.
When it comes down to it, you can look at this issue one of two ways:
1: You were ripped off, and the discs you were sold don't perform at their advertised specifications.
2: You got lucky, and ended up with some CD-Rs that would normally have costed likely 2x or 3x as much, and are much higher quality then what you should have received.
All things considered, I suggest number 2