I found this to be true. I rip to a good quality cd-r's. A lot of store bought music cd's are massed produced cheap quality. I can think of one cd in particular where it was quite obvious my burned cd sounded way better. The original had skips in some tracks, so I copied it to a cd-r.( I learned years ago that computer cd-roms can read discs that others players can't and corrects the errors) With this particular cd, not only were the skips gone but there was also way more detail in the music than from the original. But I used a music cd-r and not a data cd-r.
I don't think the write speed is as critical as I once thought. I use to burn at 2x but with my standalone burner and my new computer cd-roms I use much faster speeds and haven't noticed any gliches in the playback.
I make copies of all my original cd's and store them away.
However some of the more recent cd's have some kind of copy protection on them and this somehow degrades the burn sound quality. And they almost always leave glitches on the last track. Or you can't copy them at all. But there is more than one way to skin a cat.
