It should be noted that a 4x DVD writer is not the same thing as a 4x CD burner.
The original standard for a CD-Rom was 150KBps, so each x after that was a multiple of it (so a 4x CD-Rom/writer would be 600KBps)
A DVD is based on roughly 1.4MBps. (So a 4x DVD is actually 5.6 MBps, as compared to 600KBps)
A full 4.7GB DVD would take about 15 minutes to burn.
Take into account though I've never actually burned a DVD, thats just how the math *should* work out
