Yes, the 32X BenQ discs shown in the Media Compatibility List were tested with CD Speed ScanDisc. Is that close enough to Quality Check for you? As for the 48X media, I have not seen any such results yet.
It's not quite what you asked about, but my experience with Acer has been good. See this post in the media compatibility thread. This is 24x rated media, but works fine at 48x. The scan (with CD Doctor) was at max. which is 32x for (S)VCDs. I just checked it with KProbe and found no difference.