Maybe important for the developer and others. Initially, I was very surprised and disappointed that 'ripping' with VOB2MPG was very slow. E.g. a video of 8m11s took 28m06s to extract. More or less accidentally, I found that I should not "touch" the computer after starting the VOB extraction/conversion (the same file was now done in 3m55s). Even switching (the focus) from VOB2MPG to Explorer without any action (I only want to look at file data), decreases the speed dramatically. Going back to the VOB2MPG window does not resume the high speed.
Note. Build 3.0.0030, free version; OS Win XP Pro; IFO Mode (extraction per title).