I have a Thinkpad t60 - 15". It comes with a Matshita uj-842 DVD-ram drive. When writing to a DVD, it settles at 2x speed. Research has shown me that this is not an uncommon problem. Unfortunately, research has also come up empty as to solutions speed this drive up.
I changed the country code but this had no impact. I have finally found a link to a driver for this Burner, but before I install it, I'm going to try different media - research (and research) has pointed to "+" media, so I am going to try that.