Yes it does make it faster with DMA enabled. Also, install the new 1.33 hacked firmware, my Pioneer burns up to 3.4X on 2X discs with the new firmware.
It made my DVDRWs not work at all.
I captured a movie at 2x and it kept getting disc error on my player.
Mine is a pioneer 105. In the end I reverted back to the old firmware, burning a DVD in 60 mins is a pain in the ass but at the end of the day a small sacrifice to pay considering it plays on all of my standalone players flawlessly like the original.
Where are you getting 1.33 from. go to http://www.chrismccann.co.uk and click on downloads, then go to the Pioneer Section. It works fine with my system.