Slow dvd burn speed..?

I bought a new Macbook Pro, 2.66 GHz Intel Core 2 Duo, 4 GB 1067 MHz DDR3. When i attempt to burn a dvd using toast titanium 10, the encoding process takes over 6+ hours. I left my laptop on to burn a dvd at 12am and when i checked it at 12pm it was still at 35%... I find this very strange. Can anyone help?