I just purchased these discs and received them today. I use VOB Instant CD+DVD to burn my discs. I set it to burn at 4x using my Sony DRU500A drive. It took approx. 23-24 mins. to burn. The counter started off at 15mins but it was slow in counting down and took the forementioned 23-24 mins. Has anyone had this problem? Is there something I am doing wrong or need to do to correct this? Because it is not worth buying these discs if they are only about 6 mins faster than 2x dvd-r's. Any help would be appreciated. Thanks